[alt-photo] Re: Creating Film Negative by Enlarging a Film/ Slide Positive

[Kurt Nagy]

I'm also interested in the specific process for enlarging negatives.  All my work is traditional film and want to avoid scanning or printing anything digitally.  I do 4x5 Gum at the moment but was thinking of going up to 8x10.

Do you have a link to that APUG discussion?



On Jun 3, 2012, at 11:18 AM, Francesco Fragomeni <fdfragomeni at gmail.com> wrote:

> I got some replies on APUG just after I sent this. Seems that many people
> are doing this and enlarging slide (positive) film onto regular B&W neg
> film is fairly straight forward and treated just like making a neg in
> camera. Some use ortho film while others use regular panchromatic B&W film
> for use with color slide in order to represents tone more accurately.
> Development is done by inspection (which I already do) in both cases and
> great enlarged negatives seem to be achievable.
> 
> If anyone here has experience with this or comments I'd still love to hear
> your experiences!
> 
> -Francesco
> 
> On Sun, Jun 3, 2012 at 9:11 AM, Francesco Fragomeni
> <fdfragomeni at gmail.com>wrote:
> 
>> I'm interested in enlarging positive film (any slide/ chrome film or B&W
>> reversal processed film) onto a larger piece of traditional B&W negative
>> film (not lith) for the purpose of producing enlarged negatives suitable
>> for alt-process and Azo. I know people do this but I've had a difficult
>> time finding a solid explanation and instructions for how to go about it
>> since it is far more common to scan these days which I am very aware of but
>> not interested in with this particular case.
>> 
>> Basically, can I expose/ enlarge slide (positive) film onto regular B&W
>> negative film and achieve an enlarged negative? Is the higher contrast of
>> slide film helpful in this situation or a hinderance? Would it be better to
>> contact print B&W negative film (much lower contrast) onto another piece of
>> B&W neg film to produce a positive, develop to the same contrast as the
>> original, and then enlarge that lower contrast film-interpositive onto a
>> larger sheet of B&W neg film to achieve the enlarged negative?
>> 
>> I'm interested in this specific process of enlarging film positives to
>> larger negatives, not the alternatives so lets please try to stay on topic
>> and not go astray with conversations of digital negatives, duplicating
>> film, etc., although if reversal processing your original B&W neg to
>> positive plays a role that might be worth explaining.
>> 
>> Thank you!!
>> 
>> -Francesco Fragomeni
>> www.francescofragomeni.com
>> 
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