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====== Barry Thornton’s two bath developer ======
Formula for two bath (divided) development.

Yields a compensating effect. 


===== Preparations =====
Prepare stock solutions as described below:

<WRAP myRecipe>
**Part A**
| Water (@ 50 degrC), | 750 ml          |
| Methol,             | 6.5 gr          |
| Sodium Sulfite,     | 80 gr           |
| Water,              | to make 1000ml  |
(This is a modified Kodak D-23 solution)
</WRAP>

<WRAP myRecipe>
**Part B** 
| Water (@ 50 degrC),  | 750 ml          |
| Sodiummetaborate     | 12 gr           |
| Water,               | to make 1000ml  |
</WRAP>

As a substitute to sodiummetaborate, the following solution can be used (ref. Anchell)
<WRAP myRecipe>
**Substitute** 
| Sodiumhydroxide,       | 9.5gr           |
| Borax (decahydrate)    | 45.4 gr         |
| Water,                 | to make 1000ml  |
10ml of this solution substitutes 1gr of sodiummetaborate
</WRAP>



===== Instructions for use =====
Develop the film according to the procedure below:
  - Fill tank with part A.
  - Agitate each half or full minute; frequency not very important
  - After specified time, dump part A (back into bottle).
  - Without a intermediate rinse, fill tank with part B.
  - Make sure to dislodge air-bubbles from film surface (dunk tank into table-top or similar)
  - Agitate sparingly; one agitation half-time through development should be enough.
  - After specified time, pour off part B.
  - Stop and fix as normal 

=== Development times ===
Time per bath is approximately {3min, 4min, 5min} for films with ISO {50, 100, 400} respectively.

=== Capacity and shelf life ===
   - Part A: should keep for approx. 12 month. Capacity is approx 15 films per liter.
   - Part B: Capacity is approx 15 films per liter.
 

===== Notes =====
For lower contrast and finer grain, a plain solution of borax can be used (36 gr per liter) as part B.\\
Modify the proportion of sodiummetaborate in part B to adjust for the films SBR. Use {7gr, 12gr, 20gr} for {high, normal, low} SBR respectively.