Judy Seigel (jseigel@panix.com)
Thu, 03 Jun 1999 13:19:50 -0400 (EDT)
On Thu, 3 Jun 1999, Wayde Allen wrote:
> On Wed, 2 Jun 1999, Mac Legrandi wrote:
>
> > What are the benefits of using Deionized Ossein over Knox gelatin for
> > Carbon printing or any of the gelatin processes?
>
> First of all, ossein isn't exactly gelatin. It is the organic residue
> (primarilly collagen) left after the mineral content of the bone is
> dissolved away, and is the precursor to bone gelatin. Ossein requires
> further treatment to convert it to gelatin.
>
> I don't know if there are any particular benefits. I would guess that
> there aren't any and would be partial to the use of Knox gelatin for
> carbon printing, but then I've been wrong before.
>
> > Is it worth buying?
>
> I'm not certain. I guess it depends on the cost, and if you want to
> experiment.
>
> Terry King was the guy who was pushing the use of deionized ossein for
> paper sizing. He claimed that it worked great and required no chemical
> hardening. You might want to take a look at the list archives to see what
> has been said about it. I personally have no experience with the stuff.
>
As is in the archives, presumably, I was unable to get a size of deonized
ossein to do continuous tone gum. It may have for a couple of folks, but
not here -- with or without hardening. Nor did it wash off cleanly where
it did clear, but left in blotches. It apparently cleared with brushing,
but there still didn't seem any advantage to using it (except the fancy
name).
Judy
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