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Re: [BKARTS] Questions about methyl cellulose

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
Fax:   814-793-4045
Email:    wminter@xxxxxxxxxxxxxx

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