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--- wiki:darkroom:chemistry:formulas:farmers_print [2022/01/20 14:36] – [Table] henpe
+++ wiki:darkroom:chemistry:formulas:farmers_print [2022/05/01 12:01] (current) – henpe
@@ Line 1: / Line 1: @@
-====== Farmer's Reducer ======
+====== Farmer's Reducer (full print bleaching) ======
-For bleaching och full prints.
+For bleaching of full prints.
 Increases contrast and clears highlights
@@ Line 10: / Line 10: @@
 <WRAP myRecipe>
 **Part A**
-|                 |  x1     |  x2     |  x8    |
+|                         | x1      | x2       | x4      |
-| Ferri           | 1.2 gr  | 5 gr    | 10 gr  |
+| Potassium Ferricyanide  | 1.2 gr  | 2.5 gr   | 5 gr    |
-| KBr             | 0.6 gr  | 2.5 gr  | 5 gr   |
+| Potassium Bromide       | 0.6 gr  | 1.25 gr  | 2.5 gr  |
-| Water, to make  | 5 ml    | 20 ml   | 40 ml  |
+| Water, to make          | 5 ml    | 10 ml    | 20 ml   |
 </WRAP>
 <WRAP myRecipe>
-**Part A**
+**Part B**
-|                   | x1       | x2      | x8     |
+|                             | x1      | x2      | x4      |
-| Sodiumthiosulfate | 30 gr    | 60 gr   | 120 gr |
+| Sodium Thiosulphate (Hypo)  | 30 gr   | 60 gr   | 120 gr  |
-| Water, to make    | 120 ml   | 240 ml  | 480 ml |
+| Water, to make              | 120 ml  | 240 ml  | 480 ml  |
 </WRAP>
@@ Line 36: / Line 36: @@
 ===== Instructions for use =====
 Immerse the wet print in a tray of working solution. Don't agitate, agitation tend to cause an uneven result with more bleach on print edges. Treat for approx 5-10 sec. Thereafter, rinse the print in running water and evaluate. Repeat if necessary. When satisfactory, fix and wash the print as normally.
+A strong and rapid bleach is better for increasing (local) contrast. A weaker and more slowly working bleach is better for overall print reduction.
 ===== Notes =====
-(none)
+This recipe is from Darkroom Cookbook[(biblio:Anchell2008)], Formula #173.
+It is not clear (to me) why the KBr is needed. Most other recipes does nor contain KBr. Internet forums suggests solution A contain KBr since it can then also be used as a rehalogenating bath in a toning process?