[Table of Contents] [Search]

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [BKARTS] Creating an archival adhesive

Hi Peter,

If you can be more specific - like the name of the chemist you used to
develop this adhesive, the name of the major scientific
company that undertook the accelerated aging test and how it was
performed, give more details about the nature and extent of the various
other tests this product has undergone, and list 100% (not 97%) of the
ingredients - I may be very interested in knowing how to make a purchase.

T. A. Brown
Franconia, New Hampshire USA

Peter Krantz wrote:

Greetings to all.

Now that the heat concerning the leather treatment thread has died
down, we
should like to relate the story of how we created a product and put it to

In the last five to seven years, an increasing number of our customers
been asking us to confirm that the materials we were using in their
commissions, were of archival standard. As a result, we began to look
closely at the materials we were using.

The white glues were concerning us. PVA has been the current glue for
decades. However, it contains unstable plasticizers, which migrate to
surrounding materials, and cause problems down the track. The fact
that one
can buy PVA which has been made neutral, or even slightly alkaline, and
given a further alkali reserve (buffering), and moreover made
makes PVAs still unacceptable, as the plasticizers are still present.

Knowing this, we approached the major global adhesive companies here in
Australia, and asked them to assist us with an archival formula, to our
specifications. The long and short of it was that they were only
in sales of thousands of litres per month, otherwise, it was not
economically worth it for them. Fair enough.

So, we sought out, and found, the services of a very capable adhesive
chemist here. As a consequence, and after two or three years
of sampling, we came up with a formula which appeared to be sound, and
all the conservation standard criteria. Its base is EVA, ethylene vinyl
acetate, which, according to our adhesive chemist, is superior in
every way
to PVA. But it has to be modified to be of use in archival circles,
and to

At this stage, we had been discussing it with colleagues, and the word
around that this research was going on. Institutions started asking
for it,
and a conservation suppliers offered to distribute it. But they then gave
us even more stringent requirements before museums, etc. would even
look at
it. This included the use of the adhesive for making archival boxes which
would house antique photographs. Such a formula requires a rather
narrow pH
range. So after more modifications, and tweaking, we had it tested by a
world-standard test (PAT), and furthermore gave it to a major scientific
company to undertake a 500 hour accelerated aging test.

Once these tested were performed, only then could it be placed on the
with some degree of surety, and have it ordered by professionals
knowing the
tests it had undergone.

We openly reveal 97% of the formula. The remaining three percent are the
finer points, giving it its true qualities as an archival adhesive. We
do not reveal the percentages of the ingredients used.

The formula is relatively simple. However, the trouble and effort to
this finely-modified formula are unlikely to be undertaken by others, as
well as the very expensive scientific testing. But, the tests were
absolutely necessary in order to give confidence to others. Our own
confidence was not enough. It had to be given proper, objective
credibility. And in the course of having the various stages of the
tested, we came to see that some of the ingredients we had first used,
had thought were suitable, were not in fact sufficiently archivally
leading us to look for more acceptable alternatives.

All in all, it was somewhat a labour of love, but we created an archival
adhesive which we could confidently use in our own workshop, and give
joy to others as well.

We trust that this description may be helpful.

Peter Krantz.

Book Restorations.
34 Clanville Road,
Roseville, Sydney,
N.S.W. 2069,

(P.O. Box 500, North Sydney, N.S.W. 2059.)

Telephone: +61 2 9416.9900
Fax: +61 2 9416.6800
Email: restore@xxxxxxxxxxxxxxxxxxx

Established: 1976


Edelpappband / “Millimeter” Binding Bind-O-Rama, Entry Deadline -
October 1, 2005

For all your subscription questions, go to the
Book_Arts-L FAQ and Archive.

See <http://www.philobiblon.com> for full information

*********************************************** Edelpappband / “Millimeter” Binding Bind-O-Rama, Entry Deadline - October 1, 2005

            For all your subscription questions, go to the
                     Book_Arts-L FAQ and Archive.

         See <http://www.philobiblon.com> for full information

[Subject index] [Index for current month] [Table of Contents] [Search]