U of S | Mailing List Archive | alt-photo-process-l | Re: Sodium Carbonate (was Seeking Information on 2 problems with Gumpr

Re: Sodium Carbonate (was Seeking Information on 2 problems with Gumprocess)

I think the permanent lavender cyano toner may be lead acetate
Don Sweet

----- Original Message ----- 
From: "Judy Seigel" <jseigel@panix.com>
To: <alt-photo-process-l@usask.ca>
Sent: Thursday, May 01, 2008 6:54 AM
Subject: Re: Sodium Carbonate (was Seeking Information on 2 problems with
Gum process)

> On Wed, 30 Apr 2008, pulpfic@telus.net wrote:
> > At 09:00 AM 4/30/08 -0500, Keith Gerling wrote:
> >> I use a dilute mix of ammonia (my preference is to use sodium
> >> carbonate - washing soda - but darned if I can even find it
> >> anymore....)
> >
> > Instead of looking in the laundry aisle, wander over to the pool supply
> > (or hardware store) and pick up some pH UP - 100% sodium carbonate, no
> > fragrances or other additives.
> >
> > Take care,
> > Randi
> I bought some pool sodium carbonate once, found it serviceble but
> strikingly expensive -- at least at the time -- being as it was, plain old
> sodium carbonate.  Maybe they figured folks who had a swimming pool could
> afford to get soaked, so to speak ?
> Meanwhile, though I haven't tried it for the purpose, I have several boxes
> of Arm & Hammer "pure baking soda" in the house, for "baking, cleaning &
> deodorizing." This is sodium BI-carbonate. I have no idea if it will do
> what the sodium carbonate does in a cyano, but it deodorizes the fridge
> (allegedly, I haven't done a comparison test) and eases the digestive
> tract of persons afflicted (not my particular problem), and some folks
> with VERY white teeth use it for dentifrice, but above all it's useful in
> baking, such as sourmilk pancakes, et al. (Excellent if you have some
> spoiled milk, maple syrup & 20 minutes to spare..)
> Has anyone used it on cyano?
> A propos of which I'll note that during a year in which I tested every
> toner in print for cyano, practically back to the cave, and (with my
> students) fine-tuned the tannic acid + bleach, etc., cyano toner, I
> REPEATEDLY came across claims of a "lavender" tone via some alkali or
> other (first memory check says ammonia was the usual).  About once in 3
> years something happened -- nobody could suss out what, almost always
> something accidental -- wherein the color remained, or anyway a streak of
> it did. But otherwise nobody I heard of ever found out how to make the
> color permanent. As I recall, however, most books failed to mention that
> fact.
> Which is to say, if you can make your purple/lavender cyano stay more than
> -- oh, let's set the bar high -- a month -- you should get it named after
> you, at the very least.
> Judy