From: Campos & Davis Photos (photos@campos-davis.co.uk)
Date: 04/17/00-08:59:04 AM Z
Are you sure it is hydroquinone. Last lot we used was white powder,
but did take some time to dissolve.
Campos & Davis Photos
6 Cranbourne Road
London N10 2BT - UK
Tel: + 44 181 883 8638
Fax: +44 208883 8638
email: photos@campos-davis.co.uk
www.campos-davis.co.uk
----- Original Message -----
From: Judy Seigel <jseigel@panix.com>
To: <alt-photo-process-l@skyway.usask.ca>
Sent: 15 April 2000 20:39
Subject: Re: chemical chaos
>
>
> On Sat, 15 Apr 2000, Libby Young wrote:
> > Firstly, when using hydroquinone -- does one need to grind it up
before
> > trying to dissolve it or should the needle-like things dissolve
easily in
> > an alkali solution?? I can't get the damn things to dissolve and
have tried
> > mushing them up with a pestle but no luck. Any suggestions??
>
>
> Libby, what formula are you using? Aside from the temperature as Ed
> noted, be sure to add chemicals in the order given, and stir each
until
> completely dissolved before adding the next. It's so long since I've
mixed
> a "scratch" developer memory is hazy, but I recall that one of the
> chemicals wouldn't dissolve until you'd done the one before -- maybe
the
> first one was sodium sulfite?????
>
> > Secondly, what's the difference between Glycin (parahydroxyphenyl
Glycin)
> > and Gylcine with an 'e'. I ordered glycin and got glycine (without
any
> > chemical formulas on the bottle). But it is a glistening white
poweder
>
> Who is this doesn't know difference between glycin and glycine-- a
> chemical company? One way to tell for sure is the PRICE: Glycin is
pretty
> expensive, cheapest I know of to date may be Photographer's
Formulary and
> they're about $18 per 100 grams (by memory). Mine is dull rather
than
> glistening -- and ages into off white, even tan. It does have quite
a bit
> longer shelf life than *official* tho ultimately does decline. But
even a
> bit over the hill, still usable if you use a bit more...
>
> > which is the description I have for glycin so now I'm confused as
to
> > whether I have the right stuff or not. Anyone know how I can
distinguish
> > between the two??
>
> Another way to tell might be to mix up a small amount... have you
got a
> gram scale? Move decimal point on formula one place to the left, &
see if
> it does what it's supposed to.
>
> Let us know -- & good luck.
>
>
> Judy
>
> .................................................................
> | Judy Seigel, Editor >
> | World Journal of Post-Factory Photography > "HOW-TO and WHY"
> | info@post-factory.org >
> | <http://rmp.opusis.com/postfactory/postfactory.html>
> .................................................................
>
>
>
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