Re: Acrylic sizes for gum

From: Ryuji Suzuki ^lt;[email protected]>
Date: 02/04/05-12:23:08 PM Z
Message-id: <>

Please note that I'm very specific to Roam and Haas Rhoplex/Primal
AC-33 and AC-35. I don't know about any other "acrylic medium."

The AC-33 and 35 are used to make masonry/concrete sealants and facede
paints. These are water soluble until they dry but they have limited
solubility once they dry. AC-33 is said to be more permeable to water.

The way I arrived at these is as follows. I searched for literature to
figure out what kinds of polymers are used for what purpose in
photographic industry. Alkyl methacrylates are often used as a spacing
agent, and vinyl polymers, polyacrylamides, etc. are used as a gelatin
blends for various purposes as well. So I checked other applications
of these polymers, looked up catalogues of chemical companies and also
checked availability in small quantities. Tried AC-33 and 35 and they
worked very well in small quantity when blended into sizing and

Neither AC-33 nor AC-35 breaks down when used as a part of sizing or
emulsion even after several stages of wet processing and archival
washing. If they did, I wouldn't even mention those products here at

Ryuji Suzuki
"People seldom do what they believe in.  They do what is convenient,
then repent." (Bob Dylan, Brownsville Girl, 1986)
Received on Fri Feb 4 12:23:27 2005

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