Re: using powdered pigments in gum

Thanks Katharine,

I assume that when using tube color there is a preservative in the
formulation of the product so that is adding to the preservative in the
commercial gum.

Jack

> From: Katharine Thayer <kthayer@pacifier.com>
> Reply-To: alt-photo-process-l@skyway.usask.ca
> Date: Tue, 04 May 2004 12:26:24 +0000
> To: alt-photo-process-l@skyway.usask.ca
> Subject: Re: using powdered pigments in gum
>
> Katharine Thayer wrote:
>>
>> Jack Brubaker wrote:
>>>
>>> Dear list,
>>>
>>
>>> Do those of you who make up gum-pigment solutions add any extra
>>> preservative. I have some thymol that I used in a gum solution that I made
>>> from dry gum. Should I put some of the thymol in the VARN gum next time? Any
>>> other thought or suggestions would be appreciated.
>>>
>>
>> Hi Jack,
>> Dave or Keith can speak more to the VARN gum specifically, but I'll
>> just say more generally that the gums I've used don't seem to go bad
>> when mixed with color and kept a long time, and I don't use an extra
>> preservative for this. I have some seldom-used mixes that have been
>> sitting around for years that look and print like brand new whenever I
>> want to use them. Perhaps there was something in the stuff that got into
>> the pigment that acidified the gum too much? Just a thought,
>
>
> And of course, ignoring your precise subject line, I was talking about
> tube pigments rather than powdered pigments. Sorry about that,
> kt
Received on Tue May 4 15:58:07 2004