Quick ? on Dev Chart Abbr.

[illuminati_02]

Hi, I recently started shooting primarily with RF's and decided I needed to make it a little bit more economical, so the obvious decision was to shoot B&W and develop at home. I picked up some Diafine, Rodinal, HC-110, ID11 and DD-X. Everything on the Dev Chart seemed to make sense to me, except a couple things, which is where your help comes in.
Under HC-110, the Dilution uses letter abbreviations, what do those stand for?? And with Diafine, the developing times are 3+3, and 5+5.. what does that mean? do you develop for 3 minutes, stop, then develop again for another 3 minutes? I don't really understand as the other developers are a single developing time. Thanks!

 

[photodog]

HC110 dilutions are as follows: dilution A 1 to 15, dilution B 1 to 31.

Diafine is a two part developer, part A and part B, therefore, two times are indicated.

 

[rich815]

For more info on HC-110 go here:

http://www.covingtoninnovations.com/hc110/

The Diafine you mix up A and B, use each for 3 minutes: A, then B. I think Acros is for 5 minutes each. The instructions are pretty clear on the box.

 

[illuminati_02]

Excellent, Thank You!

 

[MartinP]

Also note that, in Europe at least, it used to be possible to find two different concentrations of HC-110 on sale - so you need to make sure the right dilution calculation goes with the right bottle !

It is possible that Kodak don't sell the different versions anymore, but I'm not sure as I switched to Ilford a while back. Conceivably, the product-numbers on the link from Rich (post #3) are old so it would be worth checking on the Kodak site.