I developed the first Efke PL100 that I have shot today in BTZS type tubes. Using gentle agitation I developed a SBR 5 negative (N+2 or thereabouts) for 25 minutes in Pyrocat HD 1-1-100. When I read the net density through the blue channel of my densitometer I found that the density range was 1.35. This would probably print on a diffusion light source enlarger (grade 1 1/2 to 2) but would possess to much contrast for my condensor enlarger without resorting to split development.
I next processed a SBR 6 negative (N+1 or thereabouts). Using the same method as previous I developed for 17 minutes and the density range was 1.40. Again would print on Grade 1-1/2 on diffusion but would be to contrasty for condensor without split development.
I next developed a SBR 5 negative for 20 minutes in the same manner as above. The net density of this negative was 1.20. This would print on both enlargers...although condensor would require minimal split development.
My last negative (SBR5) was developed in a minimal agitation using Pyrocat HD 1-1-200 (twice normal dilution for enlarging) for 40 minutes. Agitation of one minute at outset and 15 seconds at 1/4, 1/2, and 3/4 of total development time. The net density of this negative was 1.09. This method of development has provided the sharpest negative that I have probably ever encountered. This negative density is tailor made for a condensor head.
This is probably going to be my film/developer of choice from now on based upon the four negatives that I have processed. This film builds almost as much density with Pyrocat at 1-1-100 dilution as Classic 200 does with 2-2-100 dilution.
I look forward to further trials of more normal contrast scenes. This film certainly has loads of potential insofar as expansion of contrast and the development in BTZS type tubes eliminates the damage potential that some have encountered in tray development.