I do not have an answer, but I have wondered if there could be any
difficulty with mixing methyl cellulose with acrylics. In fact, I
asked this very question at the recent GBW Standards conference.
The people at Golden certainly should have some comment or
suggestion on this topic, as you have suggested. However, I am
surprised to hear them say that methyl cellulose is acidic. I do
not think that that is true.
On the other hand, there are many of us who are mixing these two
materials/compounds for a variety of end uses. Obviously, there is
a need to determine if there could be a problem. If the
manufacturers of the acrylics do not have an answer, they are
probably not going to do the research unless it becomes a financial
problem for them. Therefore, the concern falls into our lap as the
end-user. Since it is common for book arts people to mix these
compounds, someone, at some level in the book arts community, needs
to provide the research to answer such a question.
Bill Minter
On Dec 30, 2008, at 11:13 AM, Laurie Doctor wrote:
I have worked with methyl cellulose in bookmaking and in acrylic
painting (using it as an additive to the paint) and haven't had
any problems. Recently a student had a problem with an acrylic
varnish taking up some of the acrylic paint on the surface of her
piece and said the folks at Golden thought it could be the methyl
cellulose, and also claimed that methyl cellulose could cause
yellowing over time -- that it is acidic.
Does anyone have any thoughts on this?
******************************
William Minter Bookbinding & Conservation, Inc.
4364 Woodbury Pike
Woodbury, PA 16695
814-793-4020
Fax: 814-793-4045
Email: wminter@xxxxxxxxxxxxxx
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