APX100: which developer for the finest grain?

[Gerald Koch]

Rodinal Special substitute

FWIW, the following substitute formula for Rodinal Special is given by Laurent Wirmer.

Distilled water (50°C) ................. 500 ml
Potassium sulfite (anhy) .............. 225 g
Hydroquinone ............................ 40.0 g
Phenidone ................................ 5.0 g
Triethanolamine ......................... 400 ml
Potassium bromide ...................... 15.0 g
EDTA, Na2 ................................ 25.0 g
Distilled water to make ................ 1.0 l

 

[Helen B]

Another easy modification of Rodinal is to add about 60 g of sodium sulphite per litre of 1+100 (about one 35 mm film canister full per half-litre, I think). It's been mentioned on APUG here[/i] and elsewhere. I tried it after reading the BJP article, and found that it does produce finer grain, but I wasn't impressed otherwise and prefer APX100 in either W2D2+ or Perceptol 1+3, both of which have already been mentioned. For the APX100 I tried in Rodinal + sulphite I set my meter to EI 80, and developed for 11½ mins at 24°C.

Best,
Helen

 

[Zathras]

Another easy modification of Rodinal is to add about 60 g of sodium sulphite per litre of 1+100 ...(BIG SNIP)... I tried it after reading the BJP article, and found that it does produce finer grain, but I wasn't impressed otherwise and prefer APX100 in either W2D2+ or Perceptol 1+3, both of which have already been mentioned. (SNIP)
Best,
Helen

Helen,

What dev times and temps were you using with Perceptol 1+3? Also, what speed are you shooting the APX100 at?

Thanks,

Mike Sullivan

 

[Tom Hoskinson]

FWIW, the following substitute formula for Rodinal Special is given by Laurent Wirmer.

Distilled water (50°C) ................. 500 ml
Potassium sulfite (anhy) .............. 225 g
Hydroquinone ............................ 40.0 g
Phenidone ................................ 5.0 g
Triethanolamine ......................... 400 ml
Potassium bromide ...................... 15.0 g
EDTA, Na2 ................................ 25.0 g
Distilled water to make ................ 1.0 l

If you eliminated the Potassium sulfite and the water, then brought the total solution volume up to 500ml with triethanolamine; it would probably last forever as a stock concentrate.

Of course, you would need to add some sullfite to the working developer - unless you wanted tanned and stained film.