RE: Sizing paper with gum and dichromate

From: Loris Medici ^lt;loris.medici@altinyildiz.com.tr>
Date: 12/27/05-02:22:49 AM Z
Message-id: <0E3D78559D1D88438A0719E1077C31DA0281754F@altinmail.altinyildiz.boyner>

Thanks Christina. How much time the solution continues to work without problems? (Like becoming messy and unapplicable...)

TIA,
Loris.

-----Original Message-----
From: Christina Z. Anderson [mailto:zphoto@montana.net]
Sent: 26 Aralęk 2005 Pazartesi 16:52
To: alt-photo-process-l@sask.usask.ca
Subject: Re: Sizing paper with gum and dichromate

Hi Loris,
I use a 3% gelatin solution, which is probably 2.8% because I use 4 packets
of 7g each Knox gelatin in a liter of water. Then when that is prepared
(boiled or just heated, depending on whether you forget it on the stove or
not) add 20ml formaldehyde to the mix and brush on. Use right away and toss
what you don't. Rinse brush immediately after use, too.

I have not used formaldehyde for 7 years...
Chris
----- Original Message -----
From: "Loris Medici" <loris.medici@altinyildiz.com.tr>
To: <alt-photo-process-l@sask.usask.ca>
Sent: Monday, December 26, 2005 4:41 AM
Subject: RE: Sizing paper with gum and dichromate

>
> Hi Christina,
> What is the percentage of your gelatine size solution and how much
> formaldehyde do you add to it?
>
> I know you're currently using glutaraldehyde as hardener but, what was
> your procedure when you were sizing with combined gelatine /
> formaldehyde?
>
> I plan to use 6% gelatine solution and a separate hardening bath. If
> it can be made without having a messy & hard to coat gelatine
> solution, I would like to learn the way of sizing the paper with
> gelatine + formaldehyde in one step.
>
> TIA,
> Loris.
Received on Tue Dec 27 02:26:52 2005

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