Rollei IR 400 developing times . . ???

Ok, I have a roll of Rollei IR 400 shot at 12 ASA . .

I want to develop in Microdol X. According to the Massive Dev Chart it calls for 23 minutes at 21.0 C. Seems like a bit much .

Rollei RPX 400 in Mic X is 11 minutes at 20.0 C . . .???

Now, Rollei IR 400 shot at 12 ASA in D76 1+1 9:30 minutes . . .

So is the Massive D Chart wrong??

What is going on here??

They could be correct as I develop in a stronger version of Pyrocat-HD to get the times down. At the normal mixture for Pyrocat-HD, the time was a bit long for my liking as I don't like twiddling tubes for more than 12 minutes. My N time at strong dilution is 7:30 21C. (continuous tube)

I should also add that the Massive Dev Chart times don't jive with me... for me it's EI 3-6 with 72R filter. There's is for box speed, and 800... maybe that's why a longer time would be needed?... also no filter was used.

Just to clarify . . . . my question is . . .

Why is it more than twice as long for Microdol X than other developers???

FWIW, back in 1980 Kodak recommended the same times for Microdol-X and D-76 1:1 for most Kodak films, but neither were recommended for Kodak High Speed Infrared (HIE).
The only Kodak developers recommended for HIE were stock D-76 and HC-110 dil B.

Wasn't it Henning Serger , backed by Film-Niko and others who said that Rollei Retro films at all claimed speeds and Rollei IR were all the same Gevaert film, namely Aviphot 200? Henning did tests on which he based his findings so why isn't there a common time for all Rollei IR and Retro S films that are alleged to be the same?

Rollei APX and several other films "made" by Maco and Rollei are according to Film-Niko in fact Kentmere films

So to summarise what I think was being said was that: Rollei Retro 80S and 400S and Rollei IR are all Aviphot 200.
Rollei APX 100 and 400 are Kentmere 100 and 400

Not directly related to this thread but worth stating for clarity in this murky world of who makes what films , then logically there should be a commonality of developing times with the same developer for all Rollei IR and Retro films( Aviphot 200) and a same developing time for Kentmere, Rollei APX, Fotoimpex CHM 100 and 400 and Agfaphoto 100 and 400( all Kentmere 100 or 400)?

Have I got this right? If the consensus is that I have got it right then each time any questions arises on these films someone should quote my summary.

For the sake of all questioners such as John Galt, seeking help, we have to be the disseminators of wisdom and truth, don't we?

pentaxuser

So if I shoot some Rollei IR400 at 6 ASA with IR filter and plan to use d76 stock, what kind of development times should I try?

StepheKoontz said:

So if I shoot some Rollei IR400 at 6 ASA with IR filter and plan to use d76 stock, what kind of development times should I try?

Click to expand...

6 minutes @ 68F for D-76 stock is a good starting point.