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Subject: Beva film

Beva film

From: Barbara Lavorini <barbaralavorini>
Date: Thursday, September 28, 2006
Ana Botelho <ana_botelho [at] netcabo__pt> writes

>... After the treatment, the painting will go to a house with
>uncontrolled environment, so I think I'm going to use a BEVA
>adhesive. BEVA O.F. gel is an aqueous dispersion, and since the
>canvas reacts to water, I wouldn't want to use it. BEVA O.F. 371 is
>highly toxic, but BEVA film is not. Can anyone tell me if BEVA film
>is suitable for relining this painting, does it have sufficient
>strength to hold the two canvases together, given the large size of
the original canvas?

I think you might prepare the lining canvas with BEVA O.F. gel
(deciding the amount of adhesive your lining needs), then let water
and other solvents evaporate. Only when it is completely dry (one or
two days), put the painting on the lining canvas and re-activate it
with heating. For better reversibility I never put wet BEVA directly
on the original canvas, but you always need to evaluate the
painting's conditions and needs. Obviously the painting needs to
cool under pressure (better in a vacuum bag). Here are some details
from <URL:http://www.conservators-products.com/beva_gel.htm>

   "When fully dried, BEVA Gel turns into a heat-seal adhesive, with
    the same low-activation temperature as that of BEVA 371 (60-65
    deg. C, 150-160 deg. F). BEVA Gel, BEVA 371, and BEVA D-8 adhere
    to each other in every form of application."


                                  ***
                  Conservation DistList Instance 20:19
                  Distributed: Monday, October 9, 2006
                       Message Id: cdl-20-19-005
                                  ***
Received on Thursday, 28 September, 2006

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