RE: Gum hardening: top down experiment

Hi all,

I think drying flat may help in protecting some density. It doesn't make
sense to me hanging a substrate like Yupo...

Regards,
Loris.

-----Original Message-----
From: Katharine Thayer [mailto:kthayer@pacifier.com]
Sent: 11 Nisan 2006 Salı 20:45
To: alt-photo-process-l@usask.ca
Subject: Re: Gum hardening: top down experiment

On Apr 11, 2006, at 9:30 AM, Dave Soemarko wrote:

> Well, actually even the hardened
> gum is soaked up with water at that point, so the water will continue
> to develop the surrounding gum. Sort of like if you put a piece of ice
> on jello versus you put a piece of ice on gum. The first case will
> have no problem whereas the second will make a mess.

Dave,
This makes some sense to me, and may provide a potential explanation of why
this "melting" of what seemed like hardened gum sometimes happens when
printing on unabsorbent surfaces (I've never seen it on paper, but I've seen
it on yupo as well as this experience on mylar). Perhaps when the hardened,
but still wet, gum is on a paper support, the water sinks into the paper,
leaving the hardened gum intact, but on an unabsorbent surface it has
nowhere to go so it affects the hardened gum around it.

Katharine
Received on Tue Apr 11 11:54:27 2006