It is actually not too complicated to make four-color graphics.

The main difference between solid and dot printing is that dot printing has screen corners and screen lines, as well as the angle of the screen.

First, prepare the file, add small crosses around the pattern for color registration, and mark the colors of each version so that it is easy to identify which version it is when printing.

When sending the file to the film company, tell them to print the silk screen film, positive film, oval dots, and offset printing at the screen angles, namely: C75 degrees, M15 degrees, Y90 degrees, K45 degrees. How many mesh lines to produce depends on the fineness of the pattern. The higher the mesh line, the finer the pattern. The highest screen printing line is 133 lines, and 100 lines is already very fine. If you produce 100 lines, then you need to use a mesh of 300 mesh or above. Multiply the number of threads by 3 to get the mesh number of mesh you are using. The higher the thread count, the more difficult it is to screen print.

When stretching the mesh, the angle of stretching the mesh should be based on the angle of the film. Place the film under the mesh and rotate the mesh so that moire does not appear.

Dot printing is closely related to the power of the photosensitive adhesive and exposure machine, as well as the distance. Generally, a segmented test is required, which takes about 50-60 seconds.

If it is four-color overprinting during printing, the light color is usually printed first and then the dark color, that is, YCMK. The registration of each version is aligned with the small cross on the screen.

Different line numbers and substrates use different inks.

Generally there are no graphic tutorials for these things on the Internet. If you have any questions, please ask.

Hope this helps!