Hi Guy,
I have only used paper in this camera up to this point. But due to the
slow speed of paper and the very limited tonal range, I want to try film.
Thanks very much for your tip about J and C Photo. It seems like a great
resource for the more esoteric B&W materials. I found there a film that has
an ISO of 100, which is two stops faster than the Genius film.
Dave
On 3/31/06 3:30 AM, "Guy Glorieux" <guy.glorieux@xxxxxxxxxxxx> wrote:
> Hi Dave,
>
> Welcome to the list.
>
> Hmmm! 20x24 pinhole did you say. I thought I would be the only one in
> this group ever to do such a silly thing. Would love to see some pictures
> off-line! Do you have a film holder to keep the film in place? How do you
> move this contraption around town? -:)
>
> As far as Maco, this is supposed to be a reliable photo supplies producer.
> With the Genius film, you might want to experiment first with a few sheets
> of 4x5 before going the full 20x24 size. Never, ever ran into a film that
> required anything more than dilute acetic acid as a bath to stop the action
> of the developer, even when the said developer was coffee (see the RIT
> files)... A lot of people use plain water, actually. As far as fixing,
> well fixing is fixing and I would suggest to use your favorite fix.
>
> If (like me) you're not a genius, then you might want to get you film from J
> and C Photo at
> http://www.jandcphoto.com/
>
> They sell 20x24 sheet film.
>
> Best regards,
>
> Guy Glorieux
> (Montreal, large format pinhole)
>
>
>
> ----- Original Message -----
> From: "dave moore" <mooredg@xxxxxxxxxxxxxx>
> To: "List for Photo/Imaging Educators - Professionals - Students"
> <photoforum@xxxxxxxxxxxxxxxxxxxxxx>
> Sent: Thursday, March 30, 2006 4:18 PM
> Subject: FW: Maco genius print film
>
>
>>
>> Hello members,
>> I am a new member of this on line Photoforum group. By way of
>> introduction, I teach photography at Le Moyne college in Syracuse NY and I
>> am also a commercial photographer. I am also a fine art photographer and I
>> presently use a large self made pinhole camera to make images.
>> I am interested in buying a film made by Maco, a German company,
>> called
>> Genius Print Film. It is sold by Freestyle here in the USA. That's a
>> pretty
>> cocky name for any product don't you think? But anyway, I plan to buy very
>> large sheets of this film (20x24") to use in my pinhole camera. I plan to
>> contact print positives from these negative transparencies.
>> I have never used this film before and do not know anyone else who's
>> used it either. I downloaded the tech sheet from their website. My
>> questions
>> to all of you "geniuses" out there have to do with processing this film.
>> While they say the film can be processed in all types of B&W
>> developers, the type of developer exerts a pronounced influence on the
>> characteristics of the film. They seem to have very specific chemicals
>> they
>> recommend using in the processing and though I've been processing black
>> and
>> white materials for many years,typically using Kodak products, the
>> products
>> they recommend here are unfamiliar to me and I wonder how necessary they
>> are.
>>
>> 1. For developer, they recommend MACO ecoprint or Ilford PQ-Universal.
>> They
>> then say to use the hardening developer LP-Geladur to avoid scratches.
>> I've
>> never heard of any of these developers, especially a hardening developer
>> and
>> wonder if anyone out there has.
>>
>> 2. Stop bath - they recommend a hardening stop bath: LP-Citrodur; I don't
>> know if the stop bath I currently use, Kodak Indicator stop bath, is a
>> hardening stop bath.
>>
>> 3. Fixer: they recommend a fixing bath based on ammonium thisulphate - Lp
>> FIX Supra or Ilford Hypam; I currently use Kodak Rapid fixer and don't
>> know
>> if this is based on ammonium thiosulphate
>>
>> 4. washing - they recommend cascade washing in a fixed volume of water at
>> 68; I'm not familiar with the term cascade washing nor do I understand the
>> idea of a fixed volume of water; any info here would be helpful
>>
>> - they also recommend using LP-Selenia for silver protection half way
>> through the wash process; I've never heard of doing this
>>
>> 5. wetting agent - they say a final bath in demineralized, doionized, or
>> distilled water should be used to avoid drying marks and to reduce static
>> charges; perhaps this is necessary with film of this size but I really
>> don't
>> know.
>>
>> I hope this list isn't too exhaustive. Anyone who has used this film or
>> anyone knowledgeable about these processing chemicals would be of
>> considerable help. Thanks.
>>
>> Dave Moore
>>
>>
>> ------ End of Forwarded Message
