U of S | Mailing List Archive | alt-photo-process-l | Re: Direct carbon

Re: Direct carbon

On Thu, 24 May 2007, Marek Matusz wrote:
Thanks Art and Judy who replied to my note. Should the sawdust particles
be of certain size or is it good as is. Judy mentioned something about
sieving it. Is the sawdust particle size related to the graininess of the
The sawdust I got at the neighborhood lumber yard was full of all sorts of squiggles, splinters and shards. I wouldn't have sloshed it onto a print in that condition, it would almost certainly have left scratches....

I used two sizes of sieve because I had them, didn't do any comparison tests. And didn't use sawdust so very much, tho I liked it, always planned to do more, but got preoccupied elsewhere. Odds are that particle size per se isn't critical... In a slurry all particles may be more or less equal, but sieving gets out hidden chips. cigarette butts, nails, whatever. There are usually surprises in the strainer.


Marek Matusz

From: achakali@wideopenwest.com
Reply-To: alt-photo-process-l@usask.ca
To: alt-photo-process-l@usask.ca
Subject: Re: Direct carbon
Date: Thu, 24 May 2007 13:38:09 -0500

I would think so . . . I would be cautious to be certain
you've obtained it before its caustic or acid treatment

On Wed, 23 May 2007 20:13:55 -0400 (EDT), Ender100 wrote
> Art, would a slurry of paper pulp work?
> In a message dated 5/23/07 6:16:02 PM,
achakali@wideopenwest.com writes:
> I wood stay clear of pine as it is very acidic.
> I use poplar wood sawdust. Mix it with water and after a
few minutes the sawdust hydrates and you are good to go.
You want enough sawdust in the slurry so that it pours like a
thick soup.
> Art
> Best Wishes,
> Mark Nelson
> Precision Digital Negatives - The System
> PDNPrint Forum at Yahoo Groups
> www.MarkINelsonPhoto.com
> **************************************
> See what's free at http://www.aol.com.

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