ADVANTAGES OF SCREEN-PRINTING
29 Apr 2020
I like to see our customers screen-print on silicone instead of pad print, for a few reasons. First of all, you lay down more ink so the opacity of the print is never an issue. Second, there is no danger of overprinting (accidentally picking up residual ink and depositing it around the image). You have a screen with dots, and whatever comes through the dots, is your image.
Another big advantage is the option of printing in batches. Similarly to the loading templates that we offer for ink-jet printing, some of our customers have developed templates for screen-printing. They use the templates to put ten to 20 of the same product in the correct spots and print them with one screen at the same time, which dramatically increases productivity.
SPRAYING
Silicone ink can also be sprayed through an air gun. This is what is done for covering silicone products such as face masks and medical items with skin-tone colors. lnkcups offers special thinning oil to enable this application.
AVOIDING HEAT AND FRICTION WHILE DECORATING
Things to avoid with silicone ink during printing are extra friction and heat. In a hot environment, the ink will get more viscous (thick). Conversely, low temperatures prolong the pot life of silicone ink.
When screen-printing, the squeegee speed may create excessive friction over the screen, and the ink may jelly up in the screen and start to set. This mostly concerns high volume producers that run production at very high speeds. You can’t avoid friction completely, but you should slow the squeegee down. (When pad printing, the ink cup speed does not affect the ink negatively.)