Re: Maltodextrin as Replacement For Gum

[Keith Gerling <keith.gerling@gmail.com>]

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
>
>
>
>