Chromaline DZ 307 Diazo Emulsion
Chromaline DZ 307 blue diazo photo-emulsion is intended for use with plastisol inks only. This high-quality, yet economical, emulsion reaches exposure speeds of many dual cure systems. Its high viscosity won't sag in low mesh counts, yet its rheology behavior allows high stencil buildup with minimal coatings.
DZ 307 offers 37% solids with durability to withstand over 40,000 impressions, replacing more costly dual cure systems in many applications. Freeze/thaw stable. Sensitizer is included in the package.
Emulsion Exposure Differences
Proper screen exposure must take many factors into account – the emulsion type, coating thickness, exposure unit, etc. As a general guideline for the different emulsion types (diazo, dual cure, and photopolymer) use these times as a reference.
Photopolymer – These are typically the fastest exposing emulsions, with many exposing correctly from 30-50 seconds. The shortest times can be seen when using a newer LED-type exposure unit.
Dual Cure – If you have established a good exposure time with photopolymer emulsions, you can typically add 90 seconds (1.5 minutes) to that time for most dual cure emulsions.
Diazo - If you have established a good exposure time with photopolymer emulsions, you can typically add 210 seconds (3.5 minutes) to that time for most diazo emulsions.These times will depend heavily on your exposure unit and should only be considered as a starting point.