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Re: [BKARTS] Questions about methyl cellulose



Sorry if I am behind the times, but I was interested to see that Frank Mowery is now outside of Baltimore: does this mean that he is no longer at the Folger? It would be a long commute...

dp


--- On Sun, 1/4/09, William Minter <wminter@xxxxxxxxxxxxxx> wrote:

> From: William Minter <wminter@xxxxxxxxxxxxxx>
> Subject: Re: [BKARTS] Questions about methyl cellulose
> To: BOOK_ARTS-L@xxxxxxxxxxxxxxxx
> Date: Sunday, January 4, 2009, 6:52 PM
> > 
> This reply is forwarded from Frank Mowery:
> 
> 
> >> On Jan 3, 2009, at 3:57 PM, J. Franklin Mowery
> wrote:
> 
> >>> Methylcellulose is by nature not acidic, 
> Robert Feller in his study of cellulose ethers rated it as a
> superb conservation adhesive.  But how one makes the
> adhesive could result in it being acidic.  if the water used
> (straight deionized water)  the resultant adhesive could be
> acidic.
> >>> 
> >>> the original problem could easily be that
> methylcellulose, being very water soluble  would not be
> water resistant when mixed with acrylic paints that when dry
> are not resoulble in water.  but mixed with methylcellulose
> the cellulose could be resolubized.
> >>> 
> >>> Frank
> >>> 
> >>> J. Franklin Mowery
> >>> Paper Conservator
> >>> 500 Westminster Rd.
> >>> Reisterstown, Maryland 21136
> >>> 
> 
> 
> > From: William Minter <wminter@xxxxxxxxxxxxxx>
> > To: Book_Arts-L <BOOK_ARTS-L@xxxxxxxxxxxxxxxx>
> > Sent: Friday, January 2, 2009 5:48:27 PM
> > Subject: 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
> 814-793-4020
> Fax:   814-793-4045
> Email:    wminter@xxxxxxxxxxxxxx
> 
> 
> 
> 
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