Screen E-Book (.PDF) - MacDermid Autotype

The Optional TheoryThe exact part of the stencil used in the printHere are 3 images. The first is the stencil.The second is the print with the meshmarking. Under the microscope the markingwas very clear, but you can just aboutmake it out in this image. The compositeimage has made the mesh semi-transparentso it can be superimposed on the imageso that stencil edge and print alignedperfectly. You can see (and confirm fromthe individual images) that the mesh markingindeed coincides with the knuckles.The 1-2-3 explains this apparently bizarrefact. As the mesh comes out of the ink ameniscus is formed underneath the meshand this is the source of the extra ink. Printershave often worried about the ‘pillars’ ofink having a chance to flow together. Instead,the printer has to worry about howthe extra ink printed underneath the meshwill be able to level out to a smooth surface.The mesh marking is the dots of darker blueHow screen printing actually works36A superimposition using Photoshop confirms the theory