Page 21 - SCREEN PRINTING FOR BEGINNERS

Emulsion Information for the Diazo Photopolymer emulsions are
Screen Printer hybrids of the diazo and

photopolymers and are also called

Screen printers have available six dual cures. Dual cure emulsions are
types of photoreactive stencil the newest available emulsions. Due
materials. There are three direct to their hybrid nature, they have the
emulsion choices, diazo, largest available feature and quality
range. Dual cure emulsions will have
diazo/photopolymer (dual-cure),
the largest exposure latitude and
and SBQ-photopolymer. There are
also three photo-reactive film are available in various levels of

choices, indirect film, water and solvent resistant features.
Dual cure emulsions generally have
direct/indirect film, and
the best resolution, definition, and
photoreactive capillary films.
Diazo emulsions are the least bridging qualities. Dual cure
emulsions are midrange in price,
expensive and the first of the three
and higher solids content versions
emulsion types available on the
are available with reasonable
market. Diazo emulsions are mid-
viscosity.
range in available exposure
latitude and can have a good edge SBQ- Photopolymer emulsions are
very fast in their exposure speeds
definition. The drawbacks are that
but also have the smallest exposure
many require hardeners for long
latitude. They are pre-mixed and
runs or water resistance lower
solids content is often needed for have the longest shelf life. Pure

reasonable viscosity. photopolymer emulsions are the
most expensive and are best
matched with high-quality single-
point exposure systems. Pure
photopolymer emulsions have good
resolution, definition, and bridging
qualities. Pure photopolymer

emulsions have the highest solids
content available with reasonable
and often excellent viscosity.

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