Inks for Pad and Screen Printing (August 2011) posted on Tue Aug 23, 2011 Inkcups Now Sapphire SI pad- and screen-printing ink from Inkcups Now (www.inkcups.com) is formulated for adhesion to silicone products such as wristbands, iPod and iPad covers, oven mitts, swimming caps, flexible computer keyboards, remote controls, and other promotional items made of that material.