The spot color is left in the ink, and it is infrequently used. If it is left for a long time, it will affect its performance and fail. The large amount of remaining ink is a very important factor affecting production costs and cannot be ignored. The key to this problem is how to determine the amount of ink used in printing . First, various factors affecting the amount of ink must be analyzed. As shown in Figure 1.

Figure 1 Various factors affecting the amount of ink

The situation considered here is the offset printing method and the ink consumption of the printing machine under normal working conditions. Some elements in the printing environment, such as printing speed, printing pressure, and substrate status, can be considered as reasonable changes within the scope of printing acceptable prints. A brief analysis of the specific data on how to obtain these influencing factors is as follows.

Printing area

Here is a digital image processing method for printing area calculation method that has not been put into practice yet. The main steps of this method are as follows: 1 digitally collect and store the image input of the original image in a given area; 2 process the acquired original information; 3 output the operation result, that is, output the added value, which is the actual need to print The area of ​​the dot. This method can be implemented in the VC environment.

In practice there are two common ways to calculate print dot area network. One is the formula for calculating the percentage of dots , which is the Yule-Nielsen formula. However, the method itself also has certain defects, such as the rule of the dot area, the n value in the formula is not easy to determine accurately, and so the overall effect is not ideal. The other is the method that some printing companies are already using . The specific method is to copy the pattern to be printed on the carbon paper and weigh it. Cut a 10cm×10cm identical carbon paper square and weigh it. Calculate the image area: graphic area (cm2) = (100 × pattern weight) / square weight. However, the disadvantage of this method is that if the pattern is too complicated, it is not easy to cut completely, and too many artificial operations increase the uncontrollable factors, and the probability of error increases, thereby affecting the accuracy.