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Calculation of paper consumption and paper payment for single page printing of offset press

in the printing pricing work of printing companies, the cost of paper accounts for a considerable proportion in the cost of printed matter, and the calculation of paper consumption and paper payment is particularly important. Single pages include ordinary single pages (propaganda pages, real estate advertisements, commodity price lists, postal advertisements, etc.) and special single pages (the book aims to lead the development of materials science, the world famous material science research center and the world's source of new material production, the cover and insert of the magazine, etc.). According to the teaching practice of printing pricing for many years, combined with the pricing practice of printing companies, let's talk about the calculation of single page paper consumption and paper money of sheet fed offset printing machine

1 calculation of paper consumption

in the actual work of printing a single page by a sheet fed offset press, the paper consumption includes the paper consumption calculated by the actual number of printed products (theoretical paper consumption), and a small part of paper wasted by adjusting registration, ink balance, color, printing pressure, etc. in the printing process, as well as a part of paper wasted by debugging equipment in post press processing. Therefore, the paper consumption = theoretical paper consumption + addition

1) theory today, with the continuous development of international trade, the theoretical paper consumption (unit: ream)

the theoretical paper consumption is the paper consumption calculated according to the actual number of printed products, rather than the actual paper consumption in the printing process

theoretical paper consumption = number of single pages/(number of pages per page 500)

2) dosage

in the actual printing production process, a small part of paper will be wasted due to the adjustment of registration, ink balance, color, printing pressure, etc., and a part of single pages (inserts, covers, etc.) will be wasted due to the commissioning of equipment in post press processing. Therefore, the total amount of loading = printing loading + binding loading

① printing amplification amount

printing amplification amount = (number of prints per page, printing amplification rate, number of printing plates)/(number of pages on the machine 500)

printing amplification rate:

each printing plate is less than 3000, and each plate is added with about 30 ~ 50 sheets of paper (the same size as the paper on the machine)

each printing plate has more than 3000 prints, and the addition rate of each plate is about 5 ~ 10. The amount may be reduced, but it cannot be lower than the addition amount of less than 3000 prints

② binding magnification

binding magnification = (number of copies, binding magnification rate, number of pages per volume)/(number of pages per volume 500)

binding magnification rate:

the single page binding magnification rate is generally 5 ~ 15, which should be reduced when the volume is large

the minimum quantity is 2000 volumes, and less than 2000 volumes are counted as 2000 volumes

the specific values of printing amplification rate and binding amplification rate will be set by different regions and printing companies according to the actual situation of the region and the unit. Ordinary single pages (leaflets, real estate advertisements, commodity price lists, post advertisements, etc.) only consider the paper wasted in the printing process; Special single pages (covers and inserts of books and magazines, etc.) should consider not only the waste of paper in the printing process, but also the waste of single pages in the binding process

2 calculation of paper price

1) formula

unit price of each fully opened paper = area of fully opened paper (quantitative/100) (ton price/10000)

area unit: square meter

paper price = unit price of each fully opened paper order 500

2) common paper area

787mm 1092mm:0.86m2 (positive paper)

850mm 1168mm:1.0m2

880mm 1230mm:1.08m2

889mm 1194mm:1.06m2

841mm 1189mm:1.0m2

1000mm 1414mm:1.4m2

in the actual printing pricing practice, the calculation of the paper volume and paper type of a single sheet of offset printing machine should also consider the size relationship between the finished product size and the machine paper, the size of the cutting edge, the relationship between the direction of the paper filament and the printer, etc. The calculation of paper quantity and paper amount is more complex. Here, we only discuss the basic principle of paper quantity and paper amount calculation

3 attached examples

16 opening instructions, 128 text drafts (using 70g double tape), 4 color inserts (double-sided color 4+4), 24000 volumes; Product sensitivity is also what we should pay great attention to. We will reprint printing with four open four-color single sheet offset press, and others will not be considered temporarily; Suppose: the printing magnification is less than 3000 prints per plate, about 40 prints per plate, more than 3000 prints per plate, and the magnification rate per plate is about 5; Binding magnification is 10; 80g double copper for color inserting, 8000 yuan/ton. How much is the paper cost for color inserts

according to the meaning of the title:

1 paper consumption

1) theoretical paper consumption

theoretical paper consumption = number of single pages/(number of single pages 500) =24000 2/(16500) =6 (ream)

2) dosage

① printing dosage

<1/16 4 = 1/4, then 48000/4 = 12000 (four folio paper). Four printing plates are required for reprint printing, and 12000 pieces of folio paper are printed on the front of 12000 pages.There are 12000 prints on the reverse and 24000 prints on the reverse, with more than 3000 prints per edition, and the magnification is 5printing loading = (number of prints per page, printing loading rate, number of plates)/(number of machine pages 500) = (2400054)/(4500) =0.24 (order)

② binding loading = (number of copies, binding loading rate, number of pages per volume)/(number of pages per page 500) = (24000102)/(16500) =0.06 (order)

③ total loading

total loading = printing loading + binding loading =0.24+0.06=0.3 (order)

3) total paper consumption

total paper consumption = theoretical paper consumption + dosage =6+0.3=6.3 (order)

2 paper types

positive 16 Kai, indicating that positive paper is used, and the full open paper area is 0.86m2, So

1) unit price of each positive paper

unit price of each paper = paper area (quantitative/100) (ton price/10000) =0.86 (80/100) (8000/10000) =0.86 0.8 = 0.55 (yuan)

2) paper payment

paper payment = unit price of each paper 500=0.55 6.3 500=173 until the fixture breaks 25 (yuan)

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