2 bath film developers?

[Relayer]

Diafine can be got from Mr Cad and Ag Photographic. But it's not cheap

Diafine can be easy mixed from plain chemistry. Last years I was research some 2bath formulas:
Diafine revisited: Ascorbate version
Metol-Glycin two bath experiment
RD-201: Phenidone-Pyrogallol true two bath
RD-201 now is my default 2bath developer.

If you haven't experience with mixing devs from scratch, you can try "Lazy D-76". You need Soda (Sodium carbonate anh.). Make 2nd bath with 10-15 g/l of soda. Place film in D-76 stock for time less by 30% than recommended. After this place film in 2nd bath (with soda) for 3min. stop and fix. some samples:
HP5+:
http://farm6.static.flickr.com/5291/...6a94af_b_d.jpg
http://farm6.static.flickr.com/5267/...e67748_b_d.jpg
TMAX 400:
http://farm6.static.flickr.com/5062/...060e7f_b_d.jpg

[JaZ99]

I have also used Barry Thorntons 2 bath with success. In his book edge of darkness Barry suggested three different strengths of solution B for varying light conditions viz: -

For high SBR 7g of Sodium Metaborate per litre of water
For average SBR 12g of Sodium Metaborate per litre of water
For low SBR 20g of Sodium Metaborate per litre of water.

Barry Thornton didn't mention which metaborate should be used.
I did my tests with 4 mol (NaBO₂·2H₂O)

Here are my results:

18 grams of metaborate: Ḡ=0.46
24 grams of metaborate: Ḡ=0.56
31 grams of metaborate: Ḡ=0.67

Agitation: bath A: constant first 30 seconds, then 3 times each minute; bath B: 3 times at the beginning, then once every minute.

JaZ