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Re: [BKARTS] Brittle Kizukishi

If you have the same repair tissue and make your paste the same way, you should be able to duplicate everything and test it yourself. I would suspect that too thick of paste could make the paper appear to be brittle.
If you truly want a flexible mend, you might try mixing A4M Methyl Cellulose with the paste --- In fact, you might want to test that as well and see if it meets your needs.
Another experiment is to apply the paste (and any mixes) to a sheet of Mylar. After the adhesive dries, you can strip it from the Mylar and test the flexibility --- its worth it.
Good Luck,
Bill Minter

On Nov 20, 2008, at 3:04 PM, Mary Yordy wrote:

Does anyone know why a hinge of kizukishi, a Japanese repair tissue of
medium weight, would become brittle after being pasted onto ph neutral
paper with ph neutral wheat starch paste?

I was suprised that the tissue hinge was so frail and brittle when I tried
to work with the hinged piece. It was a little furled when I picked it
up a couple of weeks after doing the hinge, and when I tried to flatten
it, it broke in several places like--well--like totally brittle paper!
Something in the equation must be doubted. One person suggested that
heavy paste could have this effect of embrittling the tissue. I'd really
like to know if it's this risky to use paste that has thickened over the
course of the day, or if I should look for other causes.


William Minter Bookbinding & Conservation, Inc.
4364 Woodbury Pike
Woodbury, PA  16695
Fax:   814-793-4045
Email:    wminter@xxxxxxxxxxxxxx

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