Re: Pyrocat-HD for alt printing?

mine is in kept in brown colored bottles for two years and doing fine.
jacques
----- Original Message -----
From: "Sandy King" <sanking@clemson.edu>
To: <alt-photo-process-l@sask.usask.ca>
Sent: Wednesday, August 17, 2005 6:37 AM
Subject: Re: Pyrocat-HD for alt printing?

Susan,

I am sorry that you had problems with Pyrocat-HD.
However, I am in contact with enough
photographers to know for a fact that the stock
solution does not normally oxidize in two months,
in fact it typically lasts at least a year. If
your solution oxidized in two months there must
have been some kind of contamination of the Stock
A solution. Maybe the brown bottles had something
to do with it. I just have no experience with
these bottles as I store all of my developers in
glass containers.

Sandy

>Hi Victor,
>I was told by the photographic guru of San Diego, Ca who is still teaching
>at many years plus that the P-Cat oxidizes very quickly in the brown
>bottles
>and the bottles are the worst thing put upon the public. He says thta the
>Coca -cola clear bottles are better and the glass are fine (brown) if kept
>in a dim area.
>I have had problems with the P-Cat and will change back to Pyro which I
>know
>won't oxidize in 2 months. The important thing is to keep the bottles
>topped
>up- or; transfer to smaller bottles (if you have them).
>Hope this helps,
>Susan
>----- Original Message -----
>From: "Victor Loverro" <victor.loverro@verizon.net>
>To: <alt-photo-process-l@sask.usask.ca>
>Sent: Tuesday, August 16, 2005 9:00 AM
>Subject: Re: Pyrocat-HD for alt printing?
>
>
>Susan,
> Could you elaborate on the different containers? I always thought that
>the brown bottles were supposed to help prevent oxidation of chemicals.
>Glass being better than plastic to keep oxygen out and the brown for light.
> Victor
>
>----- Original Message -----
>From: "Susan Huber" <shuber@ssisland.com>
>To: <alt-photo-process-l@sask.usask.ca>
>Sent: Tuesday, August 16, 2005 5:18 AM
>Subject: Re: Pyrocat-HD for alt printing?
>
>
>> Hi Loris,
>> I believe the P-Cat takes less time to print out than the Pyro al
>Hutchens.
>> The thing that is troublesome is; the P-Cat oxidizes very quickly
>> compared
>> to the Pyro and that being in different containers. The brown bottles
>> are
>> the worst! Use other bottles. I am not amused at travelling 9,000 kms
>> and
>> then ruining some of my negatives... Sandy King can clarify.
>> Always,
>> Susan
>>
>> ----- Original Message -----
>> From: "Loris Medici" <loris_medici@mynet.com>
>> To: <alt-photo-process-l@sask.usask.ca>
>> Sent: Tuesday, August 16, 2005 12:17 AM
>> Subject: RE: Pyrocat-HD for alt printing?
>>
>>
>> Donald, I haven't used Pyrocat-HD for alt. processes yet (because I use
>> digital negatives, not in-camera negatives) but on every publication or
>> article I've read it was said that pyro stained negatives takes longer
>> to print - because the color is much more opaque to UV light (even if it
>> seems very thin to you). In your case the exposure takes around 2 stops
>> longer, I'm sure there will be pyro in-camera negative users that will
>> approve/disapprove this difference.
>>
>> Regards,
>> Loris.
>>
>> -----Original Message-----
>> From: donald ciccone [mailto:dsciccone@verizon.net]
>> Sent: 16 Ag~ustos 2005 Salz 06:55
>> To: alt-photo-process-l@sask.usask.ca
>> Subject: Re: Pyrocat-HD for alt printing?
>>
>>
>> ... I recently tried making a Vandyke
>> (brown) print but found my exposure times were very long (30 minutes or
>> more). The UV source is a bank of 18 inch blacklight bulbs ("350
>> Blacklight" by Sylvania). I have used the same printer with non-pyro
>> negatives and typically get exposure times for Vandyke prints in the 5-8
>>
>> minute range. Ideally, I would like to get more reasonable exposure
>> times
>> for pyro-developed negatives as well (possibly 10-15 minutes). Any
>> suggestions how to achieve this or do these negatives simply require a
>> stronger/different UV source? The pyro negatives do not appear dense or
>>
>> blocked up when viewed on a light box. Thanks for any assistance.
>>
>>
Received on Wed Aug 17 22:18:18 2005