Edwards 20X Developer for Pushing TX to 2400

[Gerald Koch]

Gerald Koch submitted a new resource:

(there was a url link here which no longer exists) - Edwards 20X Developer for Pushing TX to 2400

Distilled water (50°C) ................................ 750 ml
Metol ..................................................... 10.0 g
Sodium sulfite (anhy) ................................ 100 g
Catechol ................................................. 5.0 g
Potassium carbonate (anhy) ....................... 75.0 g
Benzotriazole ........................................... 0.1 g
Potassium iodide, 0.1% ............................. 40.0 ml
Distilled water to make...

(there was a url link here which no longer exists)

 

[Raghu Kuvempunagar]

Does anyone know what is the shelf-life of this developer? More generally, how long does a catechol-carbonate developer concentrate survive if stored properly?