The Importance of UV-Safe Bulbs for Your Screens

February 21, 2017 at 4:55 am 1 comment


Rubylith Film

What are some considerations for choosing UV-safe bulbs, and how important are they for my screens? This was a question posed by a Printwear reader, and here is Kieth Stevens’ response:

I prefer to use Rubylith film to cover my bulbs to make sure I have prevented any possibility of light contamination. Some amber covers do not sufficiently block all the UV light that can expose the coated screens, especially if the screens are being kept in the darkroom for any length of time in preparation for future use. Even the emulsion in the container can be slowly exposed if left uncovered for extended periods.

Kieth Stevens is the Western regional sales manager for International Coatings. He has been teaching screen printing for more than 10 years and is a regular contributor to International Coatings’ blogs.

International Coatings manufactures a complete line of Centris™ non-Phthalate screen printing inks, including a wide variety of whitesspecialty inksspecial effects inks,color matching systemsadditives and reducers.  In addition, International Coatings also manufactures a line of AXEON™ non-Phthalate, non-PVC special effects inks. For more information on our products, please visit our website at

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