Using Blockout is an important step in preparing a screen for press, but fixing small pin holes in your emulsion after exposure or even during the printing process is difficult to do with a regular liquid blockout. Using a block out pen allows you to quickly and easily block out small pin holes or registration marks left in the emulsion. Don’t worry about other block out solutions, simply apply this pen and the pin hole goes away! Our green blockout pen is ultra fast drying (30 to 90 seconds) and water soluble. We recommended this blockout pen for plastisol, UV and most solvent based inks. Reclaims with warm tap water.
They need to be shaken well before use and may have to be squeezed hard to get the block out fluid moving smoothly.