35mm BW - Kodak Rapid Process Slide Film!
35mm / 36 exp / iso 0.06!!!! / no DX coding
Our good friend Lance (From Belgium) is no stranger to FPP podcast listeners! The FPP On-Line Store has teamed up with Lance's Hand-Rolled Labeauratoire Films to bring you the most exciting and rare 35mm films for your favorite camera!
Film canisters are not DX Coded. Films are hand-rolled. Canister face art will vary batch by batch.
KODAK RAPID PROCESS COPY FILM (RPC)! This is a wonderfully rare film! It is actually a POSITIVE B&W TRANSPARENCY FILM so you don't get negatives but positives like B&W SLIDES!! You could even mount & project them.
This is a super slow, high contrast film (documentation says ISO 0.06) with an almost nonexistent grain structure that provides monochrome, positive transparencies with a very slight cyan/blue tint and magnificent, powerful blacks. Originally used for radiographic copy work, and copying x-rays and blueprints. Designed to be processed in a very high concentrate developer for a short time.
How do I meter for asa 0.6? You must dial the asa manually into your camera or meter. If you camera can't be set to asa 0.6, you can dial in asa 25 and set your f-stops accordingly.
25 ISO with a +1 correction would be 12 ISO
25 ISO with +2 is 6 ISO
25 ISO with +3 is 3 ISO
25 ISO with +4 is 1.5 ISO
25 ISO with +5 is 0.75 ISO
25 ISO with +6 is 0.37 ISO
25 ISO with +7 is 0.18 ISO
25 ISO with +8 is 0.9 ISO
Notes from FPP's Michael Raso - "When shooting such (an incredible!) low asa, I shoot in daylight with my lens fully open at about 1/15th or 1/30th sec. I highly recommend the Gossen Luna Pro F light meter. It dials down to a super low asa!"
RPC is a discontinued emulsion which expired in 1993 but is still giving nice results as you can see from the examples. It is an extremely low speed film. Possibly the lowest speed film ever produced? Originally made for laboratory applications, this unique film allows you to take long exposure shots in broad daylight! Most of these example shots were made on a cloudy day with an exposure at ƒ4 and a shutter speed between 4-10 seconds. With higher apertures you could have exposures up to 10 minutes or more!
above: ISO settings of the below frames: iso 0.4 / iso 0.2 / iso 0.2 / 0.1
Please note that this film is NOT E-6 process, it can be processed with normal B&W developer but it needs a very strong and quick developer. (as the name of the film suggests.)
Lance had success with Tetenal Paranol at 1:10 concentration for 7.5 seconds at 20°celsius. I suspect that Rodinal at 1:10 or 1:15 would work similarly. Perhaps a higher temperature would also improve the results.
It is a Blue Only sensitive film (similar to X-Ray) so it can be checked with a dim red safelight when developing (Kodak suggests a GBX Safelight).