U of S | Mailing List Archive | alt-photo-process-l | Re: Maltodextrin as Replacement For Gum

Re: Maltodextrin as Replacement For Gum

  • To: alt-photo-process-l@usask.ca
  • Subject: Re: Maltodextrin as Replacement For Gum
  • From: Judy Seigel <jseigel@panix.com>
  • Date: Wed, 14 May 2008 18:41:32 -0400 (EDT)
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Has someone explained why a replacement for gum is desired -- & I just missed it? Or...?



On Wed, 14 May 2008, Michael Koch-Schulte wrote:

Probably a gum based candy Jean-Claude. I mixed up some of my maltodextrin powder today. At a ratio of 1g maltodextrin to .8 ml of distilled water using a soft brush to break up the lumps. This yielded what I thought to be a thickish gummish like mixture. The mix looks the colour of wheat paste and really really sticks to the brush. Very smooth. I might be on the thick side. I'm going to let it slake in the fridge to see if it clears after sitting quite for a while. Seems to dry "sticky" on a test swatch. Probably not a good property for a faux gum. While trolling for other substitutes I found a gum arabic substitute called "C*EmCap 12683" sold by Cargill which is a modified starch marketed to soft drink manufacturers. Anyone for a moody C*EmCap-Bichromate Print? Nah!!

jean-claude Pronier wrote:
A friend of mine Pierre Brochet, master in Héliogravure, made nice gum prints using small pink bowl candy for children, in old french store they sell it from large glass jare. and it seems to be the same in US refering to Jerry Lewis movie The Errand Boy.
We call it "boules de gomme" and Pierre entitled the print "gommes de boules".

Le 30 avr. 08 à 18:19, Keith Gerling a écrit :

My testing of different colloids was not so much to find a replacement
for gum, but to find something that would give me different contrasts
and different effects when used WITH gum.  Up until recently, I used
enlarged lith film negatives that were a pain to make.  Different gums
and glues offered different contrasts and allowed me greater
flexibility and more options without having to make more negatives.
Digital curves and inkjet negs have put an end to this.

On Wed, Apr 30, 2008 at 10:30 AM, Christina Z. Anderson
<zphoto@montana.net> wrote:

What might be the benefit over gum? In other words, why the search for
other colloids--does gum present problems that another colloid would solve,
for instance?

I have used albumen and it is very fine in texture but I cannot stand the
foetid smell. But I've been told my nose is super sensitive.

I think using gelatin as a colloid is probably much hardier to require
sawdust development perhaps...and for some processes (Fresson) that is a
good thing.

----- Original Message -----
From: Michael Koch-Schulte
To: alt-photo-process-l@usask.ca
Sent: Wednesday, April 30, 2008 10:03 AM
Subject: Re: Maltodextrin as Replacement For Gum

It was while I was searching for info on screenless lithography that made
mention of it. Seems like a lot of other things are going on in this process
too though. I'm going to give it a try I think. There's a beer and wine
supplier in town which stocks the powder.

Here's the link: http://www.wmich.edu/ppse/Offset/pp6.htm


Keith Gerling wrote:
Just wondering: in the literature which you read but didn't cite did
you happen to see any compelling reasons to try Maltodextrin? I've
tried all kinds of colloids and, while many harden just fine with
dichromates, most aren't worth the hassle. The primary issue seems to
be one of clearing the unhardened colloid. Many colloids don't seem
to want to wash off the substrate without introducing alcohols or
other solvents.

On Wed, Apr 30, 2008 at 12:16 AM, Michael Koch-Schulte <mkochsch@shaw.ca>

Has anyone tried Maltodextrin as a replacement for Gum Arabic or is this
idea just goofy? Seems Maltodextrin has many of the same properties as Gum.