Help with incorrect formulas - Print Reducer & Farmer's Reducer

[Jeff Bannow]

So, I'm looking at 2 formulas from DigitalTruth.com, where the massive dev chart is located. I am assuming these are reader submitted formulas. Something doesn't seem right in the proportions - can anyone verify this for me?

http://www.digitaltruth.com/techdata/farmersreducer.php

Solution A makes 500ml, solution B makes 2 liters. Huh? They are used in the same proportion! Should I just scale one down, or is there something else wrong here?

Also ....

http://www.digitaltruth.com/data/printreducer.php

Solution A makes 1 liter, B makes 250ml. Yet A is used diluted and B isn't. Huh?

 

[Jerevan]

It seems a bit strange - the hypo solution does not keep very well and seems a waste do 2 liters if it is only used for a few negatives.

To add to the confusion:
(there was a url link here which no longer exists)

Imperial measurements always seemed like some sort of crazy code language.

 

[Jeff Bannow]

Imperial measurements always seemed like some sort of crazy code language.

Hey, I'm here in the US and use metric in the darkroom anyway! Too confusing otherwise.

 

[nworth]

There are all sorts of formulas for "Farmer's Reducer." Basically, you combine a ferricyanide solution with an hypo solution just before use. The classic Farmer's reducer is used for film, but a variation is very handy for prints. These formulas are from Kodak and are representative:

Kodak R-4a Farmer's cutting reducer for overexposed negatives
Stock solution A
Potassium ferricyanide 18.75 g
WTM 250 ml
Stock solution B
Sodium thiosulfate 240 g
WTM 1 l
Immediately before use, take 30 ml of Solution A, add 120 ml of Solution B, and add water to make 1 liter.
Place negative in working solution and watch carefully. Treat the negative for about 20 seconds; then rinse and examine. Repeat until the negative has reached sufficient reduction. When reduction is complete, wash negative for 5 minutes.

Kodak R-4b Farmer's proportional reducer for overdeveloped negatives
Solution A
Potassium ferricyanide 7.5 g
WTM 1 l
Solution B
Sodium thiosulfate 200 g
WTM 1 l

Place dry film in solution A for 1 to 5 minutes at 20C. Watch reduction carefully. Transfer film to solution B for 5 minutes, then wash. Repeat process as necessary.
Note: Can be used to reduce general fog by diluting solution A 1:1 with water.
Capacity: About 15 sheets.

I don't know where this came from, but it is an example of a variation for prints:

Farmer's reducer for prints
Stock Solution A
Potassium ferricyanide 64 g
Potassium bromide 30 g
WTM 250 ml
Stock Soultion B
Sodium thiosulfate 120 g
WTM 500 ml
For overall reduction, use 7.5 ml of Solution A, 180 ml of Solution B, and 1500 ml of water. Increase the amount of Solution A to speed up reduction.
For local reduction, use the same proportions as for overall reduction.
For spot reduction mix one part Solution A with 2 parts Solution B. Use undiluted.

 

[Jeff Bannow]

Glad to know I'm not loosing my mind.

Although I suppose this isn't the most definitive test that I haven't lost my mind.