To avoid light exposure for the sensitizer powder during the mixing process, either utilize a dark container or choose a see-through container and then cover it entirely with a dark plastic bag.
1. Sensitizer solution: Dissolve sensitizer (0.60%) with 0.50% of clean water. Then add 1.80% pigment (adds color to a transparent stencil). Stir well.
2. Add in the sensitizer solution into the Photo Flash stencil emulsion.
3. Stir well and de-air the mixture for 1-2 hours before use.
Exposure time will depend on the light source/wattage and distance of screen from the light source.