Among the four conventional printing methods, which printing ink layer is the thickest and which is the thinnest? Why?

Screen printing has the thickest ink layer, thicker screen and thicker ink layer; The embossed or lithographic ink layer is the thinnest, in which the ink is pressed directly on the paper. The metaphor of the image is that you can use an ink knife to pick a little ink and press it on the paper. The thickness of the ink left on the paper depends entirely on the applied pressure.

The post-processing of printed matter includes gluing (laminating), UV, oiling, beer, bronzing, embossing, mounting, binding and cutting. , mainly used for publicity and packaging printed matter.

Extended data:

Printing is a technology to transfer ink to the surface of paper, fabric, plastic, leather and other materials through the processes of plate making, ink application and pressure, and to copy the original contents in batches. Printing is the process of transferring the approved printing plate to the substrate through printing machinery and special ink.

In the national standard GB 9851.1-1990, printing is defined as "printing refers to the process of transferring the graphic information from the manuscript to the substrate by printing plate or other means."