What is a dura mater?

It's a transparent phone case. Advantages are bright colors, strong personality and resistance to falling. The disadvantage is that it is thick, which leads to weak heat dissipation of the mobile phone.

Film is a kind of transparent film. On one side, there is a film called matte surface, and on the other side, there is no film reflecting light. The non-smooth surface is not very reflective. If you have seen the bottom of traditional photos, you will know that the principle is similar, but the composition of the film base and film is different.

Film is divided into four colors (CMYK) and spot colors. There are four slides stacked on the film to form a complete color image, which needs to be taken to the printing plant for plate making and printed four times.

introduce

Movies are all black. Generally, there is an English symbol on the corner of the film, which is the film number, indicating which film C, M, Y and K are, and which cmyk (or spot color number) is, indicating what color this film outputs. If not, you can look at the angle of the net to tell what color it is. The stepped color bar next to it is used to check the dot density.

The color bar depends not only on whether the dot density is normal, but also on CMYK. The lower left corner of the color bar is C, the upper left corner is M, the upper right corner is Y, and the lower right corner is K. According to the color bar printing house, you can know CMYK. That is to say, in order to check the development density of the film conveniently, the corners of the film are colored. As for how many colors to print, it depends on the number of screen lines in each film.