[alt-photo] Re: Multi coat Gum -3rd+ coats tends to wash off

[John Brewer]

Hi Peter,

I'm glad you have solved your adhesion problem. Maybe put down a couple of
layers to get the pigment saturation you are after?

> I still have no understanding as to why there were no problems with 
>these thick layers when laying down the cyan layer first.

Another idiosyncrasy of gum I guess.

Best wishes,

John.


-----Original Message-----
From: alt-photo-process-list-bounces at lists.altphotolist.org
[mailto:alt-photo-process-list-bounces at lists.altphotolist.org] On Behalf Of
pfriedrichsen at sympatico.ca
Sent: Tuesday, March 02, 2010 10:31 PM
To: The alternative photographic processes mailing list
Subject: [alt-photo] Re: Multi coat Gum -3rd+ coats tends to wash off

Loris et al,

I was attempting to produce very saturated layers and in that 
attempt, I increased the gum concentration in order to accommodate 
(without staining), the amount of pigment that was required. Once I 
reduced the gum and pigment concentration, the adhesion was improved 
and the top layer behaved.

I still have no understanding as to why there were no problems with 
these thick layers when laying down the cyan layer first.

Thanks to all for the assistance.

Peter




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