Re: Mixing a light pigment for gum

About this list Date view Thread view Subject view Author view

From: Jack Brubaker (jack@jackbrubaker.com)
Date: 04/17/03-10:23:09 AM Z

Dave,

Ilove it when the world defies my best attempts at common scense. That's a
very interesting result. I wonder what was going on there...

Thanks

Jack

> From: Dave Rose <cactuscowboy@attbi.com>
> Reply-To: alt-photo-process-l@skyway.usask.ca
> Date: Wed, 16 Apr 2003 19:45:08 -0600
> To: alt-photo-process-l@skyway.usask.ca
> Subject: Re: Mixing a light pigment for gum
>
> Dear Jack:
>
> I've had actual experience with one pigment in particular that contradicts
> your theory.
>
> Gum printing with Sennelier Mars Black dry pigment (iron oxide), resulted in
> very heavy non-image area staining at 1g pigment/12ml gum. When I ground
> the same pigment/gum mixture in a mortar & pestle and then printed, the
> staining was dramatically reduced.
>
> Another curious effect with Sennelier Mars Black - the staining was heavy in
> non-exposed border areas on the test print while steps 9-14 on the Kodak
> Control Scale T-14 cleared nicely.
>
> Dave in Wyoming
>
> ----- Original Message -----
> From: "Jack Brubaker" <jack@jackbrubaker.com>
> To: <alt-photo-process-l@sask.usask.ca>
> Sent: Wednesday, April 16, 2003 1:23 PM
> Subject: Re: Mixing a light pigment for gum
>
>
>> judy
>>
>> I agree with you its not my point to say that grinding will improve a gum
>> print. Quite the opposite. I suspect that not grinding and having a slight
>> clumping actually helps the print by keeping the grain size parge enough
> to
>> not penitrate deeply into the paper.
>>
>> Jack
>>
>>> From: Judy Seigel <jseigel@panix.com>
>>> Reply-To: alt-photo-process-l@skyway.usask.ca
>>> Date: Wed, 16 Apr 2003 14:01:40 -0400 (EDT)
>>> To: alt-photo-process-l@skyway.usask.ca
>>> Subject: Re: Mixing a light pigment for gum
>>>
>>> I brush with a stiff round bristle brush to combine the
>>> gum and the powder only a bit longer than if it were tube paint -- it
>>> seems to work the same as when I mull forever.
>>
>>
>

About this list Date view Thread view Subject view Author view

This archive was generated by hypermail 2.1.5 : 05/01/03-11:59:54 AM Z CST