From: Monnoyer Philippe (monnoyer@imec.be)
Date: 06/27/02-03:01:01 AM Z
Hello John,
I would first make sure about the glue composition. If this is gelatin
or similar colloid, I would simply use an aqueous enzyme solution. The
enzyme would be in this case protease.
But what kind of paint was that. Would it be affected by a water
solution ? I don't think a priori.
Philippe
Belgium
-----Original Message-----
From: John Cremati [mailto:johnjohnc@core.com]
Sent: Thursday, June 27, 2002 10:42
To: alt-photo-process-l@skyway.usask.ca
Subject: Removal of gelatin or animial hide glue from glass
Hi,
I have a unusual problem.... I have a antique, possibly historic
,
hand painted stained glass window that was given to a associate of
mine
for restoration.... It is attributed to Rembrandt and is absolutely
magnificent!...In restoring a window such as this no broken glass is
replaced , it is just sandwiched between two clear pieces of glass and
just
left in tact...
The problem is that in a previous 19 century restoration attempt
the
restorer applied either gelatin or animal hide glue to the broken glass
and
then applied or glued a clear piece of glass to this...This animal
glue has since
partially separated from the glass and is quit distracting leaving small
fragments of glue adhering to both the clear cover glass and the painted
original glass. There is large area where the glue is solidly attached
to
both surfaces with no fragments ............... This glue needs to be
removed with out
affecting the glass painting...... I am afraid to try anything with heat
as
a "glue chipping effect" may occur and it seems that the glue or gelatin
may have become
partially insoluble possibly due to a reaction with the glass or glass
paint
/pigment which is fired on and years of exposure to sunlight.... Any
suggestions on its removal or softening this glue (or possibly just
gelatin
material)? I would be happy to forward a picture of this window off
list
on request ......
John Cremati
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