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

[Paul Viapiano]

Lith film interpositive is the most common method.

Reversal processing offers another alternative. 

On Jun 3, 2012, at 11:24 AM, Francesco Fragomeni <fdfragomeni at gmail.com> wrote:

> The above Bostick & Sullivan link doesn't give any relevant information to
> this specific query. It discusses the use of lith film with an
> interpositive process. This is a different process entirely but thank you
> for the link.
> 
> Kurt, not much is said in the APUG link as of yet. Just confirmation that
> people do it and it's fairly straight forward. Here is the
> link<http://www.apug.org/forums/forum41/106283-creating-film-negative-enlarging-film-slide-positive.html>in
> case you'd like to keep an eye on the thread as it develops.
> 
> -Francesco
> 
> 
> On Sun, Jun 3, 2012 at 10:56 AM, Kurt Nagy <kakarott76 at hotmail.com> wrote:
> 
>> 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
>>>> 
>>> _______________________________________________
>>> Alt-photo-process-list | http://altphotolist.org/listinfo
>>> 
>> _______________________________________________
>> Alt-photo-process-list | http://altphotolist.org/listinfo
>> 
> _______________________________________________
> Alt-photo-process-list | http://altphotolist.org/listinfo