Re: oil prints

I am not so sure about the problem with the fixer. Using a.o. Kentmere
, Agfa and Fotokemika papers for the bromoil proces, I just used
'normal' B/W fixer with no problem (fixing after developing to create
the positive, and again after bleaching/tanning making the matrix). If
there would be a nasty effect on the matrix in Witho's case, it also
must happen in making the matrix for a bromoil , or??.
My experience with the oil printing is mainly the fact that the info I
got from the books was misleading, what helped me out was a 6 %
gelatine coating repeated at least 3 times and using a 5%
pot.dichromate .
The temperature John mentioned looks a bit tricky to me , the swelling
could become a melting , or?
Anyway , after weeks of frustrating disasters , using the numbers I
found in the literature, I created a lot of acceptable oil-prints up to
50x60 cm with ordinary paper negatives .
Cheers,
Henk

On 24 mei 2006, at 17:58, John Grocott wrote:

>
> Witho,  I would try 1% Amm. Dich. for the same exposure time (?).
> Maybe the matrix is getting so hardened by the 3% that very little, or
> no, gelatine is being allowed to swell. There are two or three
> variables to try, including a change in the fixer, of course.
>              I know you will sort the problem in due course.
> Regards to the dog.  John.
>> ----- Original Message -----
>> From: Witho Worms
>> To: alt-photo-process-l@usask.ca
>> Sent: Wednesday, May 24, 2006 12:36 PM
>> Subject: RE: oil prints
>>
>> John,
>>  
>> 3% by immersion.
>>  
>> I just tried the same negative with the same exposure time for a
>> carbon print. The catron was very overexposed. So for the brom 240
>> this must have been enough.
>>  
>> Cheers,
>>  
>> It is already time for tea.
>>  
>> Witho
>>  
>>  
>>
>> Van: John Grocott [mailto:john.grocott403@ntlworld.com]
>> Verzonden: woensdag 24 mei 2006 13:22
>> Aan: alt-photo-process-l@usask.ca
>> Onderwerp: Re: oil prints
>>  
>> Hi Witho, What is the  % strength of your sensitizer and how is it
>> applied to the fixed out Bergger 240?  Brushing or by immersion?  
>> Exposure times might have something to do with the question, too.
>>          Woof, woof.  Have a good day.  John.
>>>  
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Received on 05/24/06-03:39:43 PM Z