Hello,
Here are my experiences with Rodinal and APH09: I develop my films (Kodak 400TX, Ilford HP5+, ClassicPan200) mainly using APH09 (still the 1+40 version) and Rodinal, both at dilutions of 1+50 (1+40) and 1+25 (1+20). As you’ve already described, both developers produce very high-sharpness and high-contrast results. The only difference I notice is the granularity. Films developed in Rodinal are slightly (but clearly!) finer in terms of fine grain than those developed in APH09.
I can’t comment on ADX, as I don’t use it. However, I do sometimes use Diafine as a two-bath developer. The processing is very simple: Solution 1 in the tank, development for approx. 4:00 mins, drain, Solution 2 in the tank, development for approx. 4:00 mins, drain, rinse with water (no stop bath!); fix, done. The temperature of the developer is not important within certain limits, nor is the time. I haven’t had any problems with the negatives yet; they’ve always been easy to enlarge. And the great thing about Diafine: after developing 20 films with each of solutions A and B, top up 700ml of the used solution with 300ml of fresh solution and develop another 20 films. I’ve been using Diafine with this regeneration method for over two years now and haven’t noticed any change in the processing results.
Best regards,
Oliver.
Thank you very much, Oliver
That’s exactly what I was interested in. So one could say that Rodinal maintains the quality in terms of sharpness and contrast, but produces a finer grain than APH09. So the development of the chemistry between 1918 and 1954 hasn’t gone unnoticed.
In which cases do you resort to Diafine? I use ATM49 for the more sensitive films, as I fear APH09 produces too much grain. But, as expected, acutance is lost. Does a two-bath developer really improve this noticeably?
Best regards,
Gilbert