[alt-photo] Re: re-acidification of fabriano

[francis schanberger]

You may have to acidify in HCl.

-francis

On Thu, Jul 1, 2010 at 12:28 AM, Paul Viapiano <viapiano at pacbell.net> wrote:

> As a sidebar to my last remarks (see below)...I tried reacidifying my
> Fabriano with a stronger solution (5% oxalic acid vs 1%) and let it soak for
> a longer period. Paper isbetter but still not hitting on all cylinders.
>
> Has anyone ever had a batch of paper that they couldn't make work? I don't
> know what else I could do except more soaking.
>
> Paul
>
>
>
> ----- Original Message ----- From: "Paul Viapiano" <viapiano at pacbell.net>
> To: "The alternative photographic processes mailing list" <
> alt-photo-process-list at lists.altphotolist.org>
> Sent: Wednesday, June 30, 2010 10:59 AM
> Subject: [alt-photo] Re: pt/pd differences in exposure methods
>
>
>  Thanks, Eric...
>>
>> I do keep detailed notes on everything.
>>
>> I worked out the problem this morning. It seems that my latest package of
>> Fabiano needs a lot more acidification than my last batch. I had one sheet
>> left from the old pile and just tested it. Perfect...all other variables
>> were exact.
>>
>> Much thanks...your reply should be in the pantheon of troubleshooting
>> lists.
>>
>> Paul
>>
>>
>> ----- Original Message ----- From: "EJ Photo" <ejnphoto at sbcglobal.net>
>> To: "'The alternative photographic processes mailing list'" <
>> alt-photo-process-list at lists.altphotolist.org>
>> Sent: Wednesday, June 30, 2010 10:48 AM
>> Subject: [alt-photo] Re: pt/pd differences in exposure methods
>>
>>
>>  Paul, Over the years there has been much discussion on different exposure
>>> units, and everything under the sun. With not only the quality of light
>>> but
>>> the quantity of light being important, they alone don't determine the
>>> speed
>>> of the coated paper. The film or substrate that holds the resist,
>>> negative
>>> both digital and traditional, blocks UV light as does the glass. it is a
>>> complicated set of variables. The glass types can change their UV
>>> blocking
>>> characteristics while keeping the same name or label. Rigorous testing
>>> over
>>> all the possible sources has not to my knowledge been done with
>>> certainty.
>>>
>>> You also have the moisture content, and make up of FO, AFO, and paper
>>> types.
>>>
>>>
>>> Mike Ware did put out a paper on platinum printing many years back that
>>> did
>>> specify yield based on certain UV output. It did hold true to my
>>> observations, but I never tried to match, make equivalent controls, etc.
>>> Best advise I can offer on that is keep notes, and use your findings for
>>> your specific set of contact frames, glass, negatives and ink sets.
>>>
>>> NuArc is a brand, but not a specific lamp; there are several that work.
>>>
>>> Eric Neilsen
>>> Eric Neilsen Photography
>>> 4101 Commerce Street, Suite 9
>>> Dallas, TX 75226
>>>
>>> www.ericneilsenphotography.com
>>> skype me with ejprinter
>>> www.ericneilsenphotography.com/forum1
>>> Let's Talk Photography
>>>
>>>
>>> -----Original Message-----
>>> From: alt-photo-process-list-bounces at lists.altphotolist.org
>>> [mailto:alt-photo-process-list-bounces at lists.altphotolist.org] On Behalf
>>> Of
>>> Paul Viapiano
>>> Sent: Tuesday, June 29, 2010 6:28 PM
>>> To: The alternative photographic processes mailing list
>>> Subject: [alt-photo] Re: pt/pd differences in exposure methods
>>>
>>> No, Jeremy, I don't.
>>>
>>>
>>> ----- Original Message ----- From: "Jeremy Moore" <
>>> jeremydmoore at gmail.com>
>>>
>>> To: "The alternative photographic processes mailing list"
>>> <alt-photo-process-list at lists.altphotolist.org>
>>> Sent: Tuesday, June 29, 2010 4:24 PM
>>> Subject: [alt-photo] Re: pt/pd differences in exposure methods
>>>
>>>
>>>  Paul, do you have a densitometer to measure the difference in reflective
>>>> dMax?
>>>>
>>>> On Jun 29, 2010 5:44 PM, "Paul Viapiano" <viapiano at pacbell.net> wrote:
>>>>
>>>> Has anyone compared exposure methods and the differences in results?
>>>>
>>>> I seem to get deeper blacks when exposing in the sun than using the
>>>> NuArc.
>>>> Even using a separate custom curve for each method, the sun gives me a
>>>> better black, more contrasty result...
>>>>
>>>> Don't get me wrong, the results are very good, but the edge goes to the
>>>> sun
>>>> prints.
>>>>
>>>> Paul
>>>>
>>>> _______________________________________________
>>>> Alt-photo-process-list | http://altphotolist.org/listinfo
>>>> _______________________________________________
>>>> Alt-photo-process-list | http://altphotolist.org/listinfo
>>>>
>>>
>>> _______________________________________________
>>> Alt-photo-process-list | http://altphotolist.org/listinfo
>>>
>>> _______________________________________________
>>> Alt-photo-process-list | http://altphotolist.org/listinfo
>>>
>>
>> _______________________________________________
>> Alt-photo-process-list | http://altphotolist.org/listinfo
>>
>
> _______________________________________________
> Alt-photo-process-list | http://altphotolist.org/listinfo
>



-- 
francis schanberger

www.frangst.com