General assumption is higher squeegee pressure means thinner the ink deposit. It is most likely because the squeegee pressure scrapes off the ink out of the screen.

However, the results are not always so. For example, from experiments with the squeegee hardness of 80 shore and 60 shore, we got results different than general assumptions. The ink film-thickness does not linearly become thinner; on the contrary, it turns to be thicker as we exert more pressure. This is because the increased printing pressure lets the pressure leak out of the flexure (bending) of the squeegee. The bending of the squeegee decreases the actual angle of the squeegee and more ink is squeezed out means increase in thickness of ink.