![]() Use a couple of humidifiers or "sick-room" vaporizers in the printing area. Use the flood stroke technique given in the instructions.įor the Acrylic Screen Inks and Textile Inks, mix with the Retarder Base. 1 photo flood, will reduce the required exposure time and resultant light bounce-back. Using a more intense light source, such as the BBA No. See relevant "Possibilities" under "Photo emulsion will not wash out to create a stencil."įailure to use a black, non-reflective background under the screen during exposure. Problem: Some small details on Photo Emulsion screen did not wash out completely. Tracing paper or film not sufficiently transparent. Improper mixing of emulsion and sensitizer. Problem: Too much or all Photo Emulsion washed out of screen after exposure. More efficient reflectors will require a higher bulb height and/or less exposure time.Īrtwork did not make proper contact with screen. The instructions lists exposure time and heights for a "disposable foil pie tin" reflector. The sensitized screen was exposed to too much light or heat before exposure to art work. More than 12 hours (at 70 degrees F.) elapsed before the sensitized screen was exposed (Speedball Bichromate System). There must not be any heat build-up (above 105 Degrees F) on the stencil during exposure. ![]() Heat as well as light will "set" the photo emulsion. Problem: Photo Emulsion will not wash out to create a stencil.Īrtwork not prepared with a visually or photographically opaque material. Scrub with a soft bristle brush and a dish washer powder/ water solution. Screen may have been used with solvent based materials or the sizing may not have completely washed out of the screen fabric. Problem: Drawing Fluid, Screen Filler or Photo Emulsion won't adhere to screen.
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