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Corrugated box price calculation method

example: face paper kraft pickup 300g/high corrugated 180g (a/b corrugated)/core paper 180g PUVA/lining paper 280g box board paper

corrugated box pricing formula

carton price (yuan) = corrugated board ex factory price per square meter (yuan/m2) × Expansion area of carton (M2)

I. calculation of ex factory price per square meter of corrugated board

1. Composition of corrugated board

corrugated board is mainly divided into three layers of corrugated board, five layers of corrugated board and seven layers of corrugated board

the three-layer corrugated box is mainly used to pack the inner packaging materials with light weight. The three-layer corrugated box is also called the single corrugated box. Its structure is composed of a piece of corrugated paper with two sides glued with a piece of tissue paper

five layer corrugated box is mainly used for the inner contents with light weight and easy to be broken in a single package; Five layer corrugated box is also called double corrugated box, which was referred to as three yellow and two tiles in the past. The structure of the five layer corrugated box is composed of face paper, lining paper, two core papers and two corrugated papers. The combination of corrugated types usually adopts AB type (Chongqing pharmaceutical packaging is the most), AC type, BC type, AE type or be type

seven layer corrugated box is composed of the following paperboards, three-layer corrugated box paperboard (mainly used for the packaging of heavy goods, such as motorcycles)

composition: it is made of face paper, corrugated paper, core paper, corrugated paper, core paper, corrugated paper and lining paper. The combination of corrugated type usually adopts bab type, baa type, CAC type or BAC type

2. Unify the measurement unit of corrugated board

1) Generally, when the carton factory purchases face paper, lining paper, core paper and corrugated base paper, the price is calculated by ton. That is, the unit of each ton of various face paper, lining paper, core paper and corrugated base paper is expressed as "yuan/ton", and it must be changed into "yuan/kg" when calculating.

if the purchase price is 5200 yuan/ton, the sample size is as small as the diameter according to the kilogram φ 0.005mm gold wire is 5200 yuan, but it has its plan and purpose/1000kg=5.20 yuan/kg

2). Generally speaking, the weight of paper is usually gram weight, which should actually be how much gram weight per square meter, that is, the weight of all kinds of face paper, lining paper, core paper and corrugated base paper is represented by "gram/m2". In order to calculate, its dosage unit must be unified, and here "gram/m2" must be converted into "kg/m2"

if you buy 300g kraft paper, that is, 300g/m2 kraft paper, then convert "300g/m2" into (300/1000) kg/m2 "to get 0.3kg/m2

3). Determination of the coefficient of corrugated base paper making corrugated paper

the corrugated base paper causes the shortening in the length direction of the paper after pressing corrugated, and its shortening ratio is called the compression ratio coefficient. There is no unified standard for this coefficient among manufacturers, because the production capacity and management level of each manufacturer directly affect the yield of corrugated paper, but the packaging industry generally defaults to the following coefficients

a corrugated paper has a compression ratio coefficient of 1.59, that is, 1.59 m corrugated paper is 1 m long after being corrugated

b corrugated paper has a compression ratio coefficient of 1.36, that is, 1.36 meter corrugated paper is 1 meter long after being corrugated

The compression ratio coefficient of thec corrugated paper is 1.50, that is, the 1.50 meter corrugated paper is 1 meter long after being corrugated

The compression ratio coefficient of thee corrugated paper is 1.27, that is, the 1.27 meter corrugated paper is 1 meter long after being corrugated

3. Calculation of paper price per square meter of all kinds of paper in corrugated box

(1) algorithm of face paper, lining paper and core paper

example: the surface paper with an purchase price of 4800 yuan/ton is 350 grams/m2, and its price per square meter should be

（4800/1000） × （350/1000）

=4.8 × 0.35

=1.68 (yuan/square meter)

(2) algorithm of corrugated paper

example: the purchase price of 1800 yuan/ton high-strength tiles is 180 grams/m2, and its price per square meter should be:

(1800/1000) × （180/1000） × 1.59

=1.8 × zero point one eight × 1.59

=0.516 (yuan/square meter)

4. Calculation of the cost price per square meter of corrugated board raw materials

existing customers need to make five-layer corrugated boxes, requiring the use of kraft pickup 300g/high corrugated 180g (a/b corrugated)/grid paper 180g PU/Li paper 280g tea board paper, and try to calculate the cost price per square meter of box board paper

list calculation:

paper name gram weight purchase price (yuan/ton) layer coefficient calculation formula (yuan/per square meter)

face paper pickup truck (300/1000) × （5200/1000） × one × 1=1.56

high strength tile paper (1.56+1.39) (180/1000) × （2250/1000） × two × 2.95=2.39

core paper (180/1000) × （1700/1000） × one × 1=0.306

lining paper tea board paper (280/1000) × （2500/1000） × one × 1=0.70

sum (yuan/square meter) =4.96

5 The main factors and coefficients for calculating the ex factory price of corrugated board

the ex factory price of carton shall include the sum of the cost price of carton raw materials and other amortized expenses

other amortized expenses include auxiliary materials (adhesives, inks, flat wires, power), equipment depreciation, workers' wages, taxes, etc

in the ex factory price of cartons, the cost of carton raw materials generally accounts for 0.5 ~ 0.7, and other amortized expenses account for 0.5 ~ 0.3. The value of general manufacturers is that the cost of carton raw materials accounts for 0.65, and other amortized expenses account for 0.35. The simple calculation adopts the coefficient of half of the labor and materials, that is, 0.5

6. Ex factory price of corrugated board

ex factory price of carton board = cost price per square meter of carton board raw materials/0.65

according to the data provided in "4. Calculation of cost price per square meter of carton board raw materials", the ex factory price of carton board should be

ex factory price of carton board =4.96/0.65=7.63 yuan/square meter $page break $

II. Calculation of carton area

1) the unfolding surface of carton is divided into single sheet with four sides of carton and single sheet with two sides of carton

2) calculation formula of carton area

the raw material used by the carton factory to produce the vast majority of cartons is web paper. The general width of web paper is 960mm, 1100mm, 1600mm and 1940mm, which can also be customized according to user requirements. The maximum width of the equipment in the carton factory is 2.2M, and the mark of A.B.C mound is generally 1.6m. The carton area is calculated as follows:

divide the width of the equipment (assuming that the width of the equipment is x meters) by the width of the carton (width + height + 0.06m) and take an integer (assuming that this integer is y), then y means that the width of the equipment can produce plates of several cartons at the same time. Therefore, the width and height of the carton should be designed according to the width when designing the carton, that is, the designer should give priority to the number of lines and layers of the contents, which can not only meet the sales count, but also meet the number of more papers, so as to reduce the increase of the single cost of the carton due to the small number of papers cut

the width of the pricing area of the carton is x ÷ y = B, and the length of the pricing area of the carton is that of the carton (length + width + 0.06) × 2 + 0.04 = a, that is, a is the length of the calculated area of the carton, so the area of the carton is B × A = s, that is, s is the area of the carton at the time of pricing. The length, width and height in the formula are all in meters (m)

according to the Korean media, 0.06 in the formula represents that the trimming amount of the carton board in the length and width direction is 60mm, and 0.04 is the tongue edge. These two values can only be increased and cannot be reduced

III. calculation example:

existing customers need to make five layers of corrugated boxes with an inner diameter of (500mm × 310mm × 240mm) it is required to use Kraft pickup 300g/high tile 180g (a/b ridge)/core paper 180g PUVA/lining paper 280g tea board paper, and try to calculate the price of the carton. The paper width of the machine is 1.6m

(1) the area of the carton is calculated as follows:

width of the carton: 1.6 ÷ (0.24 + 0.31 + 0.06) = 2

1.6 ÷ 2 = 0.8

length of the carton: (0.5 + 0.31 + 0.06) × 2 + 0.04 = 1.78m2

the area of the carton is: 1.78 × 0.8=1.42m2

(2) the price of five layer corrugated box board per square meter is: 7.63 yuan (see the calculation in Section 3)

(3) the price of carton is 7.63 yuan × 1.42 = 10.83 yuan

box partition and core filling plate are calculated by imitating this method

according to the actual demand of customers, if the demand is large, the carton factory can specially use 1.3m paper to make it on a 1.6m machine, and the carton price will be much lower. The above calculation example is still calculated as follows:

(0.31 + 0.24 + 0.06) × 2 = 1.22

then the carton factory can use raw materials with a width of 1.3m to make cartons

the pricing width of carton corrugated board is 1.3 ÷ 2 = 0.65

the pricing length of carton corrugated board is (0.5 + 0.31 + 0.06) × 2 + 0.04 = 1.78

carton area s = 1.78 × 0.65 = 1.157

then the price of the carton is 1.157 × 7.63 = 8.83 yuan

different box types have different surface areas, and the price of each carton of the same box type increases due to the reduction of the number of sides of the carton contained in a single piece

in the calculation of carton price, the purchase price of paper changes, whether the ex factory price coefficient is reasonable, how about the equipment capacity of the carton manufacturer, and whether the width of the web material used matches the width of the produced carton will affect the price of the carton

source: printing industry channel Author: Tai Chi Group, Supply Corporation, technical section pan Weiyong, Li Mingguang

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