[alt-photo] Re: Gum solution help needed

[Geoff Chaplin]

I don't have a problem using 5ml of formaldehyde in 4litres of gum - it
keeps for at least a year with no problem. If I don't use a preservative the
gum does off / grows mould in a few weeks.

Geoff Chaplin
チャップリン・ジェフ

geoff at geoffgallery.net
www.geoffgallery.net

Skype: geoffchaplin1611
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-----Original Message-----
From: alt-photo-process-list-bounces at lists.altphotolist.org
[mailto:alt-photo-process-list-bounces at lists.altphotolist.org] On Behalf Of
John Brewer
Sent: Sunday, August 08, 2010 9:36 PM
To: 'The alternative photographic processes mailing list'
Subject: [alt-photo] Re: Gum solution help needed

I use 15ml formaldehyde to 1 litre of gum.

J.

-----Original Message-----
From: alt-photo-process-list-bounces at lists.altphotolist.org
[mailto:alt-photo-process-list-bounces at lists.altphotolist.org] On Behalf Of
henk thijs
Sent: 08 August 2010 13:29
To: The alternative photographic processes mailing list
Subject: [alt-photo] Re: Gum solution help needed

Just wondering about Philippes suggestion: an aspirine i.s.o. formaldehyde
or equivalent.
If so, how much? Is one 500 mg tablet enough for one liter gum?
cheers,
Henk
------------------------------------
www.thijs-foto.com
------------------------------------

On 7 aug 2010, at 22:05, Philippe Berger wrote:

> no tymol, to conserve the gum add one aspirine (french) 
> http://fr.wikipedia.org/wiki/Acide_ac%C3%A9tylsalicylique
> Asiprine on Google, you understand
> 
> It is esay and the result is perfect to conserve the gum
> 
> Philippe Berger
> mineurdecharbon at skynet.be
> http://www.philippeberger.net/
> ----- Original Message ----- From: "Trevor Cunningham"
<trevor at chalkjockeys.com>
> To: "The alternative photographic processes mailing list"
<alt-photo-process-list at lists.altphotolist.org>
> Sent: Saturday, August 07, 2010 9:55 PM
> Subject: [alt-photo] Gum solution help needed
> 
> 
>> I have a very fine gum powder and need a little direction in 
>> preparing
the solution. I know I've asked a similar question before and Chris Anderson
mentioned something about a blender. I made a solution a few months back
when I bought the materials, but had a little sojourn in the States and it
has since turned on me (no thymol access). When I prepared it, it came out
very dark and murky, though I've heard this isn't much of an issue. But I
can't help but wonder if I was doing something wrong in the first place. The
product I have is Lobachemie (from India) Acacia powder...no other details.
>> 
>> I hate to post something so simple, but my resources are acutely 
>> limited
here.
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