steven_graver Posted August 20, 2007 Share Posted August 20, 2007 I have heard, but don't have any details, that it is possible to process Ilford FP4 film to give a positive image. My question is this; does anyone know if this can be done with b/w paper? My reason for asking is that I have built a pinhole camera and would like to load it with a sheet of paper and produce a positive image, without the need for enlarging a negative. Thanks in advance, Steve Graver Link to comment Share on other sites More sharing options...
walter_degroot Posted August 20, 2007 Share Posted August 20, 2007 there is a very slow direct reversal film dunk in paper developer wash and fix. Link to comment Share on other sites More sharing options...
john_shriver Posted August 20, 2007 Share Posted August 20, 2007 If you use paper with no lettering on the back, you can make a contact print from one sheet to another, emulsion to emulsion. There are some reversal processing kits and formulas, but I don't know of any meant for paper. Link to comment Share on other sites More sharing options...
zach_abubeker Posted August 20, 2007 Share Posted August 20, 2007 www.dr5.com Link to comment Share on other sites More sharing options...
willscarlett Posted August 20, 2007 Share Posted August 20, 2007 If you develop b&w negative film in the reversal process or shoot b&w reversal film, does it give you better tonality and such, the way color reversal film gives you better color? Link to comment Share on other sites More sharing options...
frank.schifano Posted August 20, 2007 Share Posted August 20, 2007 Any standard B&W film can be processed to produce a positive transparency. If you want to know the details, you can read about it here: http://www.ilfordphoto.com/Webfiles/20061291034093.pdf Perhaps you can modify the process a bit and try it on some paper. See what happens. I would not try this on fiber based papers. Some of the chemistry is very harsh and would probably damage the support. It might work with resin coated papers, since these materials are virtually waterproof. DR5 is no help here, they process B&W films into positive transparencies. Kodak makes/made a few direct positive films. At least one is discontinued. All are very slow and not intended as camera films. Read about them here: KODAK AEROGRAPHIC Direct Duplicating Film 2422 - http://www.kodak.com/eknec/documents/f8/0900688a802b09f8/ti0573.pdf KODAK PROFESSIONAL B/W Duplicating Film SO-132 - http://www.kodak.com/global/en/professional/support/techPubs/f11/f11.pdf There are also some direct positive, silver image, microfilms available which you can read about by poking around Kodak's website. Link to comment Share on other sites More sharing options...
frank.schifano Posted August 20, 2007 Share Posted August 20, 2007 ...or you could build a bigger pinhole camera that takes sheet film and make contact prints from the negatives. But you already knew that. Link to comment Share on other sites More sharing options...
nickc1 Posted August 21, 2007 Share Posted August 21, 2007 http://www.photo.net/bboard/q-and-a-fetch-msg?msg_id=004KFB Link to comment Share on other sites More sharing options...
nealcurrie Posted August 23, 2007 Share Posted August 23, 2007 JP, the tonality of reversal B&W is unlikely to be considered as good as the tonality of the regular developing. Link to comment Share on other sites More sharing options...
al_kaplan1 Posted August 23, 2007 Share Posted August 23, 2007 I miss Brovira number 6. I've had best results contact printing from a paper negative by using a fiber base "negative" soaking wet and squeegeeing it in contact with the printing paper. Use an overhead room lght for exposure, peel them apart, and develop the print. Jerry Uelsmann showed me the technique nearly 40 years ago. Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now