RE: Ferric Oxalate Questions

DEAR GU,
        Please consider: I use the standard 3% peroxide that I buy from the
supermarket or drug store and just three drops EXTREMELY increases the
contrast of an 11X14 platinum/palladium print. I see no reason to hunt for
the high volume peroxide for PT/PD printing.
        The only time I use 30 volume peroxide is while making Cyanotypes because I
only need a very small amount to bring out the blues during the wash.
                CHEERS!
                        BOB

 Please check my website: http://www.bobkiss.com/

"Live as if you are going to die tomorrow. Learn as if you are going to
live forever". Mahatma Gandhi

-----Original Message-----
From: Loris Medici [mailto:mail@loris.medici.name]
Sent: Sunday, July 16, 2006 3:38 PM
To: alt-photo-process-l@usask.ca
Subject: RE: Ferric Oxalate Questions

Hi Christina,

About the 135v (BTW, I don't know that is this v stuff too); it may help to
keep it out of light (as much as possible) and store it in a darkroom
refrigerator. Low heat / light helps much in preventing / slowing down the
decomposition of H2O2.

Best regards,
Loris.

-----Original Message-----
From: Christina Z. Anderson [mailto:zphoto@montana.net]
Sent: 16 Temmuz 2006 Pazar 22:27
To: alt-photo-process-l@usask.ca
Subject: Re: Ferric Oxalate Questions

You are right Charles,

You can get up to 135v at a beauty supply place, but more commonly 20, 30
and 40v. The 135v is...interesting...because it is so potent it tends to
bulge the plastic bottle at the bottom and not sit well. I have quit buying
it and stay with the safer 20V for my processes of choice. Either way, it is
very cheap, but be sure to buy the plain stuff, not the stuff that is
scented, creamy, and has additives as it is used to bleach/highlight/frost
hair.

I don't know the exact correlations between volumes and percentages, but if
I am not mistaken the drug store kind is 3.4%/10v? Some scientist on the
list can say what the 20,30, and 40v are. It doesn't just follow linearly.

Chris
CZAphotography.com
Received on 07/16/06-06:04:03 PM Z