In this experimental educational screenprinting video we discuss a concept initially used with rubylith and amberlith. If you recall this manual masking process you remember it is cut by hand and weeded out much like heat transfer vinyl. But it could be used for screen printing in 2 ways. First it can be applied directly to the screen as a physical stencil. However it may also be used as film positives. These products are not fully opaque and yet they can expose film. Why is that? Why are red and yellow safe lights usable for darkrooms in screen printing? Furthermore why are we continuing to physically block UV light from exposing screens? This is a fun experimental video in which I use red and yellow inkjet ink film positives to expose some test screens. The results are very interesting and it makes me think more about how and why the concept of rubylith and amberlith was left behind. It’s that thought and my knowledge of photographic filtering of light that led me to make this video. I hope you enjoy this eye opening tutorial. Thanks for watching and please subscribe to my YouTube channel.
Water proof inkjet films:
Inkjet Film
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Flash cure units or spot dryers come in many sizes such as 16X16, 18X20, 20X20, 24X24, 24X36 inches. A flash cure is a simple infrared heater on a stand. When flash curing plastisol screen printing inks, you want to gel the top layer sufficiently to apply a second color or layer. To cure water based inks you may need infrared radiant heat as well as air flow to get the moisture out and cure the pigments. In that case, an air flash dryer is needed. Ranar air flash dryers can be used with plastisol or water based inks, and come in two models the DA-1616, and DA-2020. These flash dryers take room temperature air, warm it and blow it on to the t-shirt or textiles.
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