What is a blocker in screen printing?
What is a blocker in screen printing?
Block-Out Method Think of this method as being the same as the hand-cut film method, except that you use a brush to paint liquid block-out directly on your screen in the areas that you don’t want to print, leaving open the areas where you want ink to pass through.
Why is my screen not exposing?
It could be that the light source is not bright enough (or the wrong kind of light waves). Or is not getting long enough. Or both! Without enough light and for too short a time the emulsion does not fully bond and go hard during exposure.
What is the photo emulsion technique?
A light sensitive solution that is designed to allow the artist to create line, tonal and gradated marks. A screen is coated with the emulsion and then a photographic positive transparency is placed over the emulsion. The screen is exposed to UV light.
How do you stop dye migration?
To avoid dye migration when printing polyester, it might be wise to purchase an ink formulated specifically for printing on polyester, or to add a low-cure additive to the ink you intend to use. Inks that cure at lower temperatures are one of the key factors in avoiding dye migration.
Can you screen print on polyester?
Although it requires significantly more set-up time than digital printing or heat transfer, screen printing is the most economical method for producing large quantities. Commonly used on cotton or cotton blend apparel, screen printing can be done on 100% polyester using special inks and additives.
How long can you leave emulsion on a screen before exposing?
Unexposed, coated screens should be “exposure ready” for as long as 6 months. This is assuming that you are storing them in an air tight container that keeps them free from light and humidity.
Can you overexpose a screen?
An overexposed screen won’t allow for enough ink through your screen while printing— resulting in prints with poor detail. An underexposed screen means you’ve lost too much emulsion and you’ll be throwing too much ink.
What happens if you overexpose a screen?
