I've made TMY my standard film for all formats and processes, and I know others are using this film in ULF sizes as well. 510-Pyro is an excellent choice of developer for use with this versatile film wether one is shooting 35mm and printing on VC paper, or shooting ULF and printing on albumen or salted paper, and everything in between. Development times are conveniently short, even when developing to the extremely high contrast and density range of which this film is capable. 510-Pyro is compatible with all films, formats and development processes, including rotary development and reduced agitation techniques. The data presented here is based on a 1:100 dilution and continuous agitation @ 68F.
Grade 2 enlarging paper DR 1.0
N............5:00
N+1.........8:00
N+2.........13:45
Azo G3 or VC paper DR 1.25
N-1........5:00 min
N...........6:30
N+1........11:30
N+2........15:00
Effective Film Speed (EFS)
N-1......500++
N.........640+
N+1......640++
N+2......800--
Azo G2 DR 1.65
N-2......5:25
N-1......7:00
N.........10:40
N+1......13:45
N+1.76..16:00
EFS
N-2.......640-
N-1.......640+
N..........800--
N+1.......800-
N+1.76...800
Albumen or P.O.P. DR 2.0*
N-2........7:00
N-1........10:00
N...........12:40
N+1........15:00
* all of the data here relates to densitometer readings in the Blue wavelengths. The UV processes above would actually print with significantly more contrast than this data suggests, and as such, it should only be seen as a conservative example of the expansion potential of this film/developer combination with these processes.
While the range of expansion and contraction development and the range of printing processes shown here is very wide, it does not cover the all of the possibilities presented by this combination. It is clear that this dilution is not ideal for contraction development and graded papers, for instance, in which case a 1:200 dilution would be more practical. 510-Pyro is an excellent candidate for reduced agitation techniques. I've used a 1:500 dilution, and reduced agitation for 20 min. development of LF high contrast ortho film with very good results. I've also used 510-Pyro with 35mm film printed on VC papers with equally good results. I hope this information will be useful for those using 510-Pyro with TMY, or for those considering doing so.
Jay
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