From: Manuel Gomes Teixeira (PunctumStudios@netc.pt)
Date: 09/01/01-03:41:31 AM Z
Hi S. Shapiro,
I'm quite obsessed by shadow detail so I've always gave generous exposure
with this film. I usually use it at 100 ISO with priority to shadows but
even like this I getting the problem I've described at first.
Perhaps you could have another suggestion ?
Greetings
Manuel Gomes Teixeira
Punctum Studios
Portugal
EU
> From: Steve Shapiro <sgshiya@redshift.com>
> Reply-To: alt-photo-process-l@sask.usask.ca
> Date: Fri, 31 Aug 2001 19:36:59 -0700
> To: alt-photo-process-l@sask.usask.ca
> Subject: Re: POP choices
>
> With Bergger films, I had found the same thing. Longer development times
> will not yield longer range nor a more dense negative.
>
> There is a safety factor in most modern films that prevent over developing,
> and restrict you from a push development [expanded development] more than
> about 2 1/2 stops. With trix - ultra expansion can be obtained up to three
> stops.
>
> Bergger has this quality and it is a good one. To overcome this limitation
> for sunlight [or UV] printing, simply plan for that and over expose the
> stops. (Answer part two) With over exposing, or to lower the EI (exposure
> index) below the ISO then to develop using the staining developer Pyro
> (Pyrogallolic acid developer formulae) what it gives is a long range in the
> highlights and very accomplished shadow detail, too. But without the
> original exposure, nothing can add on to the negative by development.
>
> S. Shapiro, Carmel
> ----- Original Message -----
> From: "Sandy King" <sanking@clemson.edu>
> To: <alt-photo-process-l@skyway.usask.ca>
> Sent: Thursday, August 30, 2001 3:15 PM
> Subject: Re: POP choices
>
>
>>>
>> Just as a curiosity, have you gotten enough contrast for POP with BPF
>> and developers other than Pyro? My own experience with BPF is that it
>> does not respond positively beyond a certain CI to increasing
>> development times, period, irrespective of developer. There is
>> something about this film that causes it to shut down when it reaches
>> a certain CI, and prolonged development beyond this point does
>> nothing but increase b+f.
>>
>> Sandy King
>>
>>
>>
>>
>>
>>
>>> Hi Carl,
>>>
>>>
>>> This topic of pyro developed negatives to use both with POP silver and
> Pt/Pd
>>> is very interesting to me because I've concentrated myself on this two
>>> methods for contact printing and discussions about this matter are
>>> practically absent.
>>>
>>> I use BPF with Rollo Pyro from Lotus View Camera in Expert drums and the
>>> results I got until this moment are not entirely satisfactory.
>>> With normal developing times the contrast is simply not enough for POP
> and
>>> I tried to give longer times but overall B+F+Stain increased to a level
>>> that the exposure needed to UV is to long with the related problems.
>>> I've tried as you recommend in "The New Platinum Print" :
> "strengthening
>>> the developer and cut the developing time" but I didn't solve the above
>>> described problem.
>>>
>>> Perhaps I'm missing something concerning pyro development.
>>>
>>>
>>> greetings
>>>
>>> Manuel Gomes Teixeira
>>>
>>> Punctum Studios
>>> Portugal
>>> EU
>>>
>>>
>>>> From: Carl Weese <cweese@earthlink.net>
>>>> Organization: Carl Weese Associates
>>>> Reply-To: cweese@earthlink.net
>>>> Date: Thu, 30 Aug 2001 11:37:26 -0400
>>>> To: Alt-photo-process <alt-photo-process-l@sask.usask.ca>
>>>> Subject: POP choices
>>>>
>>>> James,
>>>>
>>>> Assuming you will have access to a darkroom for film development (4x5
>>>> film in trays doesn't take much space): FP4+ in PMK pyro will give you
>>>> negatives you can print in POP silver, and then later print in Pt/Pd
> or
>>>> on standard variable contrast silver paper. Pretty good combination.
> It
>>>> gives high acutance if that's what you're after. As for obtaining it
> in
>>>> Japan, just take a couple dry packaged kits from ArtCraft Chemical
> with
>>>> you. Each will make 50 liters of working solution which is enough for
> an
>>>> enormous number of 4x5's. The mixed stock solutions have excellent
> shelf
>>>> life. Tri-X/PMK is another good pair. TMX and HP5 are more trouble
>>>> getting enough contrast for POP processes. Of course observe proper
>>>> precautions for handling pyro which is more toxic than more ordinary
>>>> developers.---Carl
>>>> --
>>>> Web Site with picture galleries and workshop information
>>>> http://home.earthlink.net/~cweese/index.html
>>
>>
>
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