How to calculate the amount of printing ink skillfully?
Time:2023-08-17
Views:1645
First of all, we need to know what important factors will affect the amount of ink. Basically, the amount of ink will be affected by the following factors:
Minimum amount of ink for printing machine
When the ink is put into the printing press, not all of it is transferred to the paper. The ink passes through a number of different rollers and is dispersed and transferred to the paper. Therefore, some parts are not used for printing, and are lost on the press, covering the drum. In addition, a certain amount of ink should be reserved for the ink supply, so the ink on the drum and in the ink tank should be counted as the amount of ink used. This amount can be understood as the minimum amount of ink on the printing press. Pay special attention to different brands and models of printing presses, the minimum amount of ink will be different. Of course, the greater the number of prints, the minimum amount of ink on the printing machine will become irrelevant.
Printing area
The spot color area of a print is directly proportional to the amount of ink. The larger the spot color area, the more ink consumption. Therefore, the spot colour area of the print is used to calculate the amount of ink. If the pattern of the printing area is more regular, of course, it can be easily calculated using different graphical formulas of mathematics, otherwise, the following methods can be used to calculate the area:
1) First copy the pattern on the copy paper;
2) Then cut the pattern out of the copy paper;
3) Put the cut out pattern on the scale to calculate the weight;
4) Cut the blank copy paper into 10cm x 10cm squares;
5) Put the 10cm x 10cm (100cm2) square on the scale to calculate the weight;
6) The pattern area can be calculated by the following formula:
Pattern area cm2=(100x pattern weight)/ square weight
Print quantity
The number of prints is most directly related to the amount of ink used. The greater the number of prints, the more ink will be used.
Ink loss rate
In the general printing process, in addition to part of the ink will be lost on the drum, some will also be lost when the head is used to test the printing effect. In addition, as the ink loss rate can also be used to adjust the error in the calculation of ink volume, the operator can decide whether to evaluate it.
Printing ink thickness
The thickness of the printing spot color ink does not directly represent the printing density, so it can not be calculated with the general Densitometer. Since the thickness of the ink is quite thin, when the thickness cannot be measured with a densitometer and ruler, it can be calculated indirectly with the help of an ink qualitator or an ink spreading machine. The use of these devices to calculate the thickness of spot color ink has a lot of knowledge, the author will discuss with readers in the future.
The thicker the spot color ink, the amount of ink will increase. Therefore, before printing, it is necessary to determine the printing thickness of the ink in order to calculate the amount of ink. The author also advises readers not to reduce the thickness of the ink in order to save the amount of ink, because some colors can be printed at a specific thickness, and the ink is too thick, which will also cause other printing problems.
Ink Specific gravity
Ink specific gravity is the weight of each cubic centimeter of ink. This parameter can also be calculated by ink qualitator or ink spreading machine.
Now we can begin to discuss how to calculate the amount of ink. First of all, we must know the basic ink amount of each print. Using the printing area and ink thickness of the spot color pattern, you can know the ink volume of a printed matter, and then use the specific gravity of the ink volume to convert the weight, you can calculate the ink volume of a printed matter. Readers may also refer to the following formula:
Printing ink amount (g)= printing area x ink thickness x ink specific gravity
After calculating the ink consumption of a printed matter, the ink consumption of the entire printing order can be calculated, and then the ink consumption at the time of production can be calculated by adding the ink consumption rate and the minimum ink consumption of the printer.
Production ink consumption = one printing ink consumption x loss rate x number of prints + minimum ink consumption
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