Re: oil-print-glyoxal??

Hi,
Can I ask you why you are not hardening?
Thanks,
Giovanni

----- Original Message -----
From: "henk thijs" <henk.thijs@hetnet.nl>
To: <alt-photo-process-l@sask.usask.ca>
Sent: Thursday, December 23, 2004 11:02 AM
Subject: oil-print-glyoxal??

> Since some time I am working with oil-printing; it is much easier to
> handle compared to bromoil (if one has anyway some big negatives for
> cyano or gum...), but what about hardening.
> In principle it is the same way of working compared to gum. Some
> gelatine layers , a dichromate etc.; but no glyoxal,formaldehyde or
> chromealum after sizing (one needs the swelling of the gelatine, so a
> hardening at that stage cannot be done).
> After the inking, I am not sure if the gelatine at the highlights is
> protected against bacterie-growth, there is little or no ink at the
> highlight-areas. I could not find any info in the books.
> Any idea??
> Cheers,
> Henk
> --
>
> --------------------------------------
> H e n k T h i j s - P h o t o g r a p h y
> photography http://www.thijs-foto.com
> member of F68 http://www.f68.nl
> --------------------------------------
>
Received on Mon Dec 27 16:49:15 2004