PRINTING METHDOS AND PROCESS MODIFICATIONS

PRINTING PROCESS MODIFICATIONS 

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Heat Transfer Roller Printing 

Like traditional roller printing, heat transfer printing is done by passing the fabric around a central drum or cylinder where it contacts a roller for transferring the design. The roller is followed by a heating zone to effect the sublimation of the dye. Since all colors are applied to the fabric at the same time, 

however, the operation is simpler with lower processing costs and fewer personnel required. Production can change rapidly from one design to another simply by changing the design paper, whereas in roller or screen printing, each separate roller or screen moved from the machine and the machine set up for a new design with different rollers or screens. Short runs are feasible, fast deliveries are possible, given shorter time for processing, and companies need not keep costly inventories of fabric in stock. On the other hand, heat transfer printing is slower than is either roller or screen printing. 10 to 15 meters of printed fabric are produced per minute in transfer printing operations. 

Heat transfer printing has proved especially successful in printing knitted fabrics. Knitted goods are less dimensionally stable than are woven fabrics. Manufacturers using conventional screen and roller printing techniques on knit fabrics experienced difficulties in making multicolor prints in which the segments of the print must fit together accurately. In transfer printing, all parts of the design are applied at once, eliminating the problem of fabrics stretching as they move from one roller to another. 

Losses of fabric through faulty printing are substantially lower during heat transfer printing than are losses in conventional roller printing. Energy requirements are also lower. Garments and garment pieces can be printed, and precise placement of decorative motifs on a completed garment is possible 

Transfer Printing 

Literally moving a design from one surface to another is known as transfer printing. A typical well-known technique is that of iron-on prints of emblems and decorations, which are generally made of pigments in a paraffin or thermoplastic base that can be melted and bound by heat and pressure onto a fabric surface. These pigment transfers are not very satisfactory because they make the cloth stiff and are not fast to laundering or light. A more sophisticated and effective method of transfer printing is that of transferring a design intact by vaporizing it from the paper to a fabric. There have evolved two principal processes: dry heat transfer and wet heat transfer 

Heat Transfer Printing 

Heat transfer printing, or sublimation printing, is a system in which dyes are printed onto a paper base and then transferred from the paper to a fabric. The transfer of colors takes place as the color vaporizes or “sublimes.” Transfer printing is achieved by rolling or pressing the paper and the fabric together under pressure and at high temperatures (424°F or 200°e). Sublimation printing achieves a sharpness and clarity that other types of printing cannot match. One disadvantage of heat transfer printing, however, is off-grain printing. Some dyes used on nylons and acrylics have displayed variations in shade depth and, in some cases, problems with fastness to laundering. Heat transfer printing also consumes a large quantity or print paper that cannot be reused and may present a disposal problem. Transfer printing can also be used to apply designs to garments such as T-shirts and jackets. Often the design is comprised of pigment colors on a paper sheet. When this is placed on the textile item and a hot press is applied the pigments adhere to the fabric in the design pattern. The design area is usually somewhat stiffer than the rest of the fabric. 

Initially, heat transfer dyes were disperse dyes mostly effective on nylons and polyesters. Disperse dyes can also be used on acrylics, triacetates, and polyester and cotton blends where the proportion of polyester is relatively high. In the early 1990s development of several alternative processes have extended heat transfer printing to silk, cotton and other cellulosic fabrics, and wool.

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Textile Printing methods; Methods Of Direct Printing

Block Printing Methods
The oldest method of printing designs on fabric is block printing by hand. It is not commercially important today because it is too slow––printed fabric cannot be produced inexpensively in large enough quantities by the hand block method. To make blocked prints, the design must first be carved on a wooden or metal block. The dyestuff is applied in paste form to the design on the face of the block. The block is pressed down firmly by hand on selected portions of the surface of the fabric, imprinting the carved design as many times as desired on a specific length of cloth. To obtain variation of color in the same design, as many additional blocks must be carved as there will be additional colors. The portions of the design that will appear in different colors must be separately imprinted by hand before each design is complete. The more colors used, the more valuable and expensive the blocked print will be, because of the enhanced beauty of design as well as the labor involved in the hand printing.

Roller Printing Methods
Roller printing is the machine method of printing designs on cloth by engraved rollers. It turns out color-designed fabrics in vast quantities at the rate of 1000 to 4000 yards (914-3658 m) an hour. This method of producing attractive designs is relatively inexpensive when compared with any hand method. It is a machine counterpart of block printing. In roller printing, engraved copper cylinders or rollers take the place of the hand carved blocks. Just as there must be a separate block for each color in block printing, so must there be as many engraved rollers in machine printing, as there are colors in the design to be imprinted. With each revolution of the roller, a repeat of the design is printed. Engraving is frequently done by pantograph transfer. Separate photographs on individually sensitized copper plates are taken for each color of the design. An artist then paints the appropriate color of the pattern on each plate. The engraver traces the outline of the design on the plate with one arm of a pantograph, plate which simultaneously cuts the design (with a diamond needle on its other arm) into the curved surface of a copper roller. Next, a chemical resistant is coated over the areas of the roller that will print the color, and the roller is treated with acid. The acid etches the unprotected areas, which form the design pattern to be used for color printing.

Each roller is polished for uniform smoothness so that the dye will spread evenly on the raised areas. They are then locked into precise positions on the machine for proper registration (alignment). The number of rollers used depends upon the number of color in the design, and as many as sixteen rollers can be employed.

Each of the engraved rollers first comes in contact with a companion roller that has been submerged in the dye paste to be used for its part of the design. A sharp blade, called the doctor blade, scrapes the excess dye from the surface of the roller. As the fabric passes between the engraved rollers and smooth cylinder rollers, the dye from the shallow areas is passed on it.

Behind and along with the fabric being printed is another fabric, called the back gray, which absorbs the excess print paste and multi color roller printing prevents it from striking through and staining the smooth rollers


The printed cloth is immediately passed into a drying chamber and then into a steam chamber where the moisture and heat sets the dye. The back gray is eventually washed out and reused.

Duplex Roller Printing
Duplex printing is done with rollers on a special machine that imprints designs on both sides of the fabric at the same time. Most often, the same design is printed on opposite sides, although different designs can be printed on each side. The resulting fabric looks like fabric with a woven design. This process is seldom used now, as it is almost as expensive to create duplex prints as it is to weave designs.

Rotary Printing Method
A printing machine that utilizes seamless cylindrical screens made of metal foil was originally developed in Holland. This process is called rotary screen-printing. The machine employs a rotary screen for each color, as in flat screen-printing, and the design for each rotary screen is made in a manner similar to automatic flat screen-printing. As the fabric to be printed is fed under uniform tension into the printer section of the machine, its back is usually coated with an adhesive, which causes it to adhere to a conveyor-printing blanket. Some machines use other means of gripping the cloth firmly in place. The fabric passes under the rotating screens through which the printing paste is automatically pumped from pressure tanks. A squeegee in each rotary screen forces the paste through the screen onto the fabric as it moves along, at rates of up to 100 yards (91 m) per minute.

Rotary screen-printing combines the advantages of roller and flat screen-printing techniques. Rotary metal screens are lightweight in contrast to the heavy copper rolls, and they cost less. They give color depth that is similar to or as good as that of flat screens. Prints of various types and intricate designs with shades of up to twenty colors can be obtained with a high degree of accuracy and sharpness.

Stencil Printing
Stencil printing originated in Japan. Its high cost limits its use and importance in the United States. In stencil printing, the design must first be cut in cardboard, wood, or metal. The stencil may have a fine, delicate design, or there may be large spaces through which a great amount of color can be applied. A stencil design is usually limited to the application of only one color and is generally used for narrow widths of fabric.

Screen Printing Method
Originally, this technique was referred to as silk-screen printing because the screens were made of fine, strong silk threads. Today, they are also made of nylon, polyester and metal. Screenprinting is done with the use of either flat or cylindrical screens.

Flat bed screen printing
Flat bed screen-printing is done commercially on long tables 9 to 60 yards in length. The roll of fabric to be printed is spread smoothly onto the table, whose surface has first bee coated with a light tack adhesive. The print operators then move the screen frames by hand successively along the whole table. Printing one frame at a time, until the entire fabric is printed. Each frame contains one color of the print. The rate of production ranges from 50 to 90 yards per hour by this method. A substantial amount of commercial hand screen-printing is also done on cut garment parts. In printing cut garments, an apparel manufacturer arranges by contract with screen printers Greige Carpet Needle Belt Magnet Color 2 specializing in this service. Customized or unique patterns are printed on garment parts before the pieces are sewn together.

Such items as printed beach towels and novelty printed aprons, draperies, and shower curtains are also printed by hand screen methods because it is possible to make large screen frames for large design repeats.

Hand screen-printing is also used for printing limited-quantity, high-fashion couture as well as for printing small-quantity runs to market-test a design. Flat-bed Zimmer carpet printing machine lays down each color separately form printing paste applied by means of two magnetic roller squeegees. Pressure is controlled by the selection of heavy or light squeegees and by varying the current going to the electromagnet. Endless belts fitted with needles assure a positive drive for good register.

Printing Methods; Methods of textile printing

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Methods of Printing 

There are three basic approaches to printing a color on a fabric. Direct, Discharge and Resist. Transfer Printing is comparatively a new method which is also gaining popularity Direct Printing. The most common approach for applying a color pattern is direct printing. It may be done on a white fabric or over a previously dyed fabric, in which case it is called overprinting. The dye is imprinted on the fabric in paste form, and any desired pattern may be produced. The dyes are usually dissolved in a limited amount of water to which a thickening agent has been added to give the necessary viscosity to the print paste. 

Direct Printing Method

The principle of direct printing is creation of a colored design by applying a dye or pigment directly onto a textile substrate (yarn or fabric). Discharge Printing. Another approach for applying a color pattern is discharge printing. The fabric is dyed in the piece and then printed with a chemical that will destroy the color in designed areas. Sometimes the base color is removed and another color printed in its place, but usually a white area is desirable to brighten the overall design. When properly done, discharge printing gives very good results; however, the discharged areas may literally fall out of the fabric if the goods are not thoroughly washed after printing (a rare situation today). The usual method of producing discharge prints is to print the design, such as polka dots, with a paste containing a reducing agent. A steaming follows and then there is a good washing to remove the by-products of the reaction. Resist Printing A third approach to obtaining a color pattern is resist printing. Bleached goods are printed with a resist paste––a resinous substance that cannot be penetrated when the fabric is subsequently immersed in a dye. The dye will affect only the parts that are not covered by the resist paste. After the fabric has passed through a subsequent dyeing process, the resist paste is removed, leaving a pattern on a dark ground. Their are several other methods also for printing textiles. Two are of significant commercial importance: the screen print method and the roller print method. A third method, heattransfer printing is a comparatively new concept & less significant. Other printing methods rarely used in commercial production of textiles are block, batik, ikat, and resist printing. Many textile printers print fabrics in both screen and roller methods. Most heat-transfer printing is done by printers that specialize in this method. 

Batik 

Batik cloth is made by a wax-resist process. The name batik originates in the Indonesian Archipelago, where resist printing has become an important art form. Wax is applied to the areas that the printer does not want to dye. In Indonesia a small, spouted cup with a handle called a tjanting is used to apply the wax. Melted wax is poured from the tjanting onto the cloth. When it hardens, the wax coats the fabric so that the dye cannot reach the fibers. 

If several colors are to be used, the process becomes somewhat more complex. For example, if a fabric is to be colored white, red, and blue, the artisan begins with a creamywhite cotton cloth. Those areas that are to remain white and those that are to be red are coated with wax. The fabric is now subjected to a blue dyebath, and the exposed areas take on the blue tint. The wax is boiled off and reapplied to cover the blue and white areas. When the fabric is placed in the red dyebath, the color penetrates only the uncovered areas of the design. After dyeing is complete, the fabric is treated with a fixative (a mordant) to make the colors fast, and a final rinse in hot water removes all traces of wax. For faster production a technique was devised whereby the wax could be printed onto the surface of the fabric with a device called a tjap. The design is carved on a tjap block, the block is 

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PRINTING

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Textile Printing

Printing has often been described as dyeing in a localized area to create patterned design. Creating design interest in fabrics can be accomplished in several ways, including yarn variation (novelty yarns). Weave variation (dobby and jacquard), and color effects in weaving. An additional color design can be created through the process of printing design shapes onto previously woven, knitted, or non-woven fabrics. 

Textile printing uses the same dyes or pigments applied to produce dyed fabric. The same principles of specific dye classes having select fiber affinities and the general fastness characteristics apply equally to printing and dyeing. 

The designs for printed fabrics are an important element of the printed fabrics industry. A continuous supply of new designs are required for this highly fashion oriented segment of the textile industry. 

Dyes or pigments used in dyeing are usually in a water bath solution. When the same dyes or pigments are used for printing, they must be thickened with gums or starches to prevent the wicking or flowing of the print design. The thickened solution, about the consistency of heavy buttermilk, is called the print paste. Some dyes cannot be used in printing pastes for reasons such as insufficient solubility and low color yield. 

The application of a pattern to fabric by the use of dyes, pigments, or other colored substances may be effected by a variety of hand or machine processes. Freehand painting of designs on fabrics is probably the oldest technique for applying ornament, but hand painting is a time-consuming procedure. Furthermore, it does not always result in a uniform repeat of a motif that is to be used more than once. If a design is transferred to a Bat surface that can be coated with a dye and then stamped onto the fabric, the same design can be repeated many times over simply by pressing the decorated surface against the fabric. This process is known as printing. Over many centuries a variety of techniques for printing designs have evolved. Printing can be applied to warp yarns, to fabrics, or to apparel pieces-for example, slogans or pictures on T-shirts. 

In general, printing is a cheaper way of creating designs on fabric than weaving or knitting with different colored yarns. Printing can be done with dyes or pigments. For pigments it is necessary to use an adhesive to bind the colored substance to the fabric. Different methods for applying designs can be combined with a number of printing tools or machines to provide the printer with a variety of processes. 

Methods of Printing 

There are three basic approaches to printing a color on a fabric. Direct, Discharge and Resist. 

Direct Printing 

The principle of direct printing is creation of a colored design by applying a dye or pigment directly onto a textile substrate (yarn or fabric). Discharge Printing. Another approach for applying a color pattern is discharge printing. The fabric is dyed in the piece and then printed with a chemical that will destroy the color in designed areas. 

Batik 

Batik cloth is made by a wax-resist process. The name batik originates in the Indonesian Archipelago, where resist printing has become an important art form. Wax is applied to the areas that the printer does not want to dye. 

Methods Of Direct Printing 

Block Printing

The oldest method of printing designs on fabric is block printing by hand. It is not commercially important today because it is too slow 

Roller Printing 

Roller printing is the machine method of printing designs on cloth by engraved rollers. It turns out color-designed fabrics in vast quantities at the rate of 1000 to 4000 yards (914-3658 m) an hour. This method of producing attractive designs is relatively inexpensive when compared with any hand method. 

Rotary Printing 

A printing machine that utilizes seamless cylindrical screens made of metal foil was originally developed in Holland. This process is called rotary screen-printing. 

Screen Printing

Originally, this technique was referred to as silk-screen printing because the screens were made of fine, strong silk threads. Today, they are also made of nylon, polyester and metal. Screen printing is done with the use of either flat or cylindrical screens. 

Heat Transfer Roller Printing 

Like traditional roller printing, heat transfer printing is done by passing the fabric around a central drum or cylinder where it contacts a roller for transferring the design. The roller is followed by a heating zone to effect the sublimation of the dye. Since all colors are applied to the fabric at the same time, 

Other Printing Techniques 

Photographic Printing 

Photographic printing is done in a manner similar to the photochemical preparation of screens for screen printing. A photosensitive dye is coated on the fabric, a negative is placed over the fabric, light is applied, and a photographic type of printing takes place. 

Electrostatic Printing 

Electrostatic printing is an experimental process in which a plate with an electrostatic charge is placed behind the fabric. A stencil in the form of the pattern is placed over the fabric. Special powdered inks that can be attracted by the electrostatic charge are passed over the surface fabric, and the inks are attracted into and color the fabric in the open areas of the stencil. 

Flock Printing 

By imprinting an adhesive material on the surface of a fabric in the desired pattern, and then sprinkling short fibers over the hesive, a flocked print may be created.

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TEXTILE ECONOMICS; Product Costing Methods, Job Order Costing System and Process Costing

Product Costing Methods 

The Basic methods of product costing are: 

Job Costing: allocates costs to products that are readily identified by individual units or batches, each of which is independently identifiable. When using the job cost system, costs are accumulated for each individual unit produced, or each separate order of products. This method is especially useful when producing something that is unique or custom-made. Job order costing would be used bya caterer, a garage, a helicopter manufacturer, a construction company and a textbook publisher, 

Contract Costing: a subset of job costing which is applied to relatively large cost units which take a long time to complete, typically over a year (e.g. civil engineering projects, ship building, building and construction etc). A separate account is maintained for each contract. Contract accounts involve: 

• determination of cost of sales 

• annual comparison of value of work certified as a proportion of the contract value and the costs to date as a proportion of total costs as a means of assessing the profit that should be recognised 

• record of payments received on account 

• records future expenses and accrued expenses 

Guidelines for Determining Profit to Date on Contracts No Profit is taken if contract is at an early stage. Reliability (prudence) concept is applied and losses are recorded as incurred or anticipatedIf the contract is near completion a proportion of the profit should be recognised having regard to work certified and costs to date 

Process costing: is applied when goods or services are produced from a series of repetitive or continuous processes or operations and the costs of processing are charged to the process as a whole before being averaged out over the units produced during the period. Process costing is used in a variety of businesses including distilling, water distribution, textiles, paint mixing and glass manufacture. 

Job Order Costing System 

The basic records maintained in a job-costing system include: Job-cost sheet (also called job-cost record or simply job order): records all costs for a particular product, service or batch of products are recorded on the job-cost sheet from: 

Materials requisitions: detail materials and components drawn from stores for particular jobs are priced and summarised, and entered as direct material costs on the job-cost record. Labour time records: show the time a particular direct worker spends on each job and are summarised to give direct labour cost on ‘the job-cost sheet. The manufacturing overhead will often be based on these labour hours or otherwise separately calculated and entered on the job cost sheet separately 

Actual rate vs. predetermined rate (normal) costing system 

Job-costing systems uses actual costs of direct labour and materials to determine the cost of individual jobs. However, a problem arrives with overhead costs, which are dependent on what is happening to the other jobs that are in process at the same time and can only be known after the event. Actual rate costing is a method of job costing that traces indirect costs to a cost object by using the actual indirectcost rate(s) times the actual unit of absorption base (direct labour, machine hours etc.), Predetermined rate (normal) costing systems use estimated amounts (at a normal level of activity) for the manufacturing overhead costs that are applied to each job and estimated amounts for the absorption base to calculate a predetermined overhead rate. This rate is based on the total estimated overhead costs for the period and the estimated usage of the absorption base (e.g. machine/labour hours). 

General Approach to Job Order Costing 

The following seven-steps approach is used to assign actual costs to individual jobs 

l Identify the chosen cost object(s) 

2.Identify the direct costs of the job 

3.Select the cost-absorption base(s} 

4.Identify the indirect costs associated with each cost-absorption base 

5.Compute the rate per unit of each cost absorption base to allocate indirect costs to jobs 6.Compute the indirect costs allocated to the job 

7.Compute the cost of the job by adding all direct costs assigned to it 

Process Costing 

Process costing (a.k.a. continuous operation costing) is a method that is applied when goods or services are produced from a series of repetitive or continuous processes or operations and the costs of processing are charged to the process as a whole before being averaged out over the units produced during the period. ‘A process costing system involves the costs of producing similar items being accumulated and allocated to the products by averaging costs over large number of nearly identical products. The average cost per unit is calculated by dividing the total production cost by the number of units produced. Process costing would be used by businesses such as food processors, household product manufacturers, chemical processors and oil refiners.. 

General approach to process costing 

I. collect cost data for the period on production cost report; 

2. prepare statement of physical flows and equivalent units of output for the period; 3. ascertain the total costs to be accounted for this period; 

4. calculate the cost per equivalent unit; 

5. apportion cost between finished output and work-inprogress; and 

6. check that all costs accounted for 

Similarities between process costing and absorption costing 

Both track the same manufacturing cost elements: DMs, DL, 

DEs and Mfg OhdsBoth involve WIP, FG and COGS 

Differences between process costing and job costing 

• No. of WIP accounts: PCS have many WIP accounts whereas 

JCS have one WIP account 

• Documentation to track costs 

JCS = job cost sheet 

• PCS = production cost report for each process 

• Point at which costs are totaled 

JCS - mfg costs totalled on completion 

• PCS - mfg costs totalled at fixed time intervals 

• Unit cost computation 

JCS - total job costs/no of units produced 

• PCS - total period costs/units produced in the period 

WIP and EQU/V ALENT UNITS 

Processes rarely deal with solely with completed units and therefore we need ‘to deal with output in terms of completed units and those still in the process at various stages of completion in the process. The notion of Equivalent Units enables work in process to be expressed in terms of completed output. 

Equivalent units may be defined as: A notional quantity of completed units substituted for an actual quantity of incomplete physical units, when the aggregate work content of the incomplete units is deemed to be equivalent to that of the substituted quantity of

TEXTILE ECONOMICS; Cost Terminology, Classification and Basic concepts

Cost and Cost Terminology: 

Cost is a resource sacrificed or forgone to achieve a specific objective. It is usually measured as the monetary amount that must be paid to acquire goods and services. A cost must not be confused with an expense, that is that part of costs of the goods or services that has been used up in the process of generating revenues. Actual Cost is the cost incurred (a historical cost) as distinguished nom budgeted costs. 

Cost Object is any activity, product, service or other item for which we can make a separate cost measurement. Examples would include a product, sales area, TV advertising campaign, employee, delivery van etc. 

Costs Classification 

Costs may be analysed into: Manufacturing costs (factory/ production) - Direct: labour, materials and variable overhead Indirect: manufacturing support Non-manufacturing costs - Selling and Marketing, Distribution, Research and Development Finance, General & Administrative 

Handout: Cost classification 

There are two basic stages of accounting for costs: 

1) Cost Accumulation: the collection of cost data in some organised way based on some natural classification such as materials or labour, using an accounting system. 

2) Cost Assignment: involves 

(a) tracing accumulated costs to one or more cost objects; and 

(b) allocating/apportioning accumulated costs to one or more cost objects such as activities, departments, products, customers etc. 

Handout: Basic cost concepts: 

Cost Assignment Methods

Traceability is the ability to assign a cost directly to a cost object in an economically feasible way using a causal relationship. Tracing is the assignment of costs to cost objects using either an observable measure of the cost object s resource consumption or factors that allegedly capture the causal relationship. “ Drivers are factors that cause changes in resource usage, activity usage, costs and revenues. Resource drivers measure the demands placed on resources by activities and are used to assign the cost of resources to activities by allocation and apportionment. 

For example, factory rates apportioned by floor space or supervisor time allocated to different production departments. 

Resource drivers also allocate/apportion service activities to production activities. Activity drivers measure the demands placed on activities by cost objects and are used to assign the cost of activities to cost objects. For example, the number of inspection hours used to assign the cost of inspection to individual products, or machine hours as a basis for absorbing departmental indirect costs. 

Direct tracing is the process of assigning costs to cost objects based on physically observable causal relationships (direct materials and labour). 

Driver tracing is assigning costs using drivers, which are causal factors. Often this means that costs are first traced to activities using resource drivers and then to cost objects using activity drivers. The driver approach relies on identification of factors that allegedly capture the causal relationship. 

Handout: Functional cost classification 

All costs can broadly be classified into manufacturing and non-manufacturing costs. Manufacturing costs include all costs of converting raw materials into completed products and non-manufacturing costs are all costs other than manufacturing costs. Manufacturing costs can further be divided into direct costs and indirect costs. 

• direct costs of a cost object are those that are related to a given cost object (product, department. etc.) and that calibe traced to it in an economically feasible way. Direct costs can be divided into direct materials and direct labour (and possibly direct expenses). 

• indirect costs are related to the particular cost object but cannot be traced to it in an economicallyfeasible way instead the costs are allocated to cost objects. 

Identifying product costs for a manufacturing firm 

There are typically two major cost elements: 

• Direct costs 

• Indirect overhead Cost 

The direct costs include direct materials, labour and expenses. 

The overhead costs include indirect material, labour and expenses split between: 

• Establishment costs (expenses incurred in providing the product or service environment [factory overheads] 

• Selling and Distribution costs (all costs of marketing and distributing the product); Administration costs (all costs of directors, managers and administrators and their associated expenses in terms of office overheads) 

• Finance costs (all costs of borrowed capital including interest and expenses incurred in raising funds) For product costs we are concerned with direct costs and establishment costs. 

Direct vs. indirect materials 

The cost of those materials and components that can be directly and conveniently traced to a unit of product are called direct materials (e.g. steel, windscreen-wipers or gearbox In a car). _Materials not directly traceable, and those extremely small in monetary value, are typically called indirect materials (e.g. dishwasher detergent in a fast-food restaurant, oil for production equipment, rags for cleaning or screws in a furniture factory) 

Direct VS. indirect labour 

The costs of production labour that can be directly and conveniently traced to a unit of product are called direct labour (e.g. workers on an assembly line, or chef in a restaurant) is direct labour, while labour costs that are not directly traceable, or those extremely small in monetary value, are typically called indirect labour (e.g. storekeepers, foremen, or secretaries) 

Production/factory/manufacturing overheads 

All costs related to the manufacturing operations, except for direct materials and direct labour, are called production/factory/ manufacturing overhead. Examples of such costs include, factory rent, factory rates, factory heating and lighting, depreciation of plant and equipment, insurance of the factory, and store costs.