Trapping common problems

In printing, trapping is also known as trapping, also known as scaling, mainly to compensate for the trapping of two adjacent colors due to inaccurate printing. When people face print, they always feel that dark colors are close to human eyes and light colors are far away from the human eye. Therefore, when trapping a manuscript, he always tries to prevent dark colors from appearing. The dark color above remains unchanged to ensure that it does not affect the visual effects. There are four main trapping methods.

1. Stratification: Trapping is achieved on the different layers by means of element indentation or outer expansion.

2, the shift method: by moving the position of the inflection point in the color block to achieve shrinkage or external expansion, generally used in the gradient-related trapping.

3, monochrome line superimposition method: add light-colored lines on the edge of the color block, and the line attribute is selected as overprint.

4. Synthetic line method: add synthetic lines on the edge of the color block. Line attributes are not selected as overprint.