Re: Maltodextrin as Replacement For Gum

[Judy Seigel <jseigel@panix.com>]

Has someone explained why a replacement for gum is desired -- & I just 
missed it? Or...?

thanks,

J.

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!!
> ~m
>
> jean-claude Pronier wrote:
> > Bonjour
> > 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.
> > > > Chris
> > > >
> > > >
> > > >
> > > > ----- 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
> > > >
> > > > ~m
> > > >
> > > > 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>
> > > > wrote:
> > > >
> > > >
> > > > 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.
> > > >  ~m