Gevaert G.262

[LD]

skład wywoływacza:
siarczyn sodu -- 70g
hydrochinon -- 25g
węglan potasu -- 90g
bromek potasu -- 2g
woda -- do 1 litra
pozdrawiam
Piotrek

W składzie podajesz węglan potasu, ja znalazłem w sieci przepis z węglanem sodu w takiej samej ilości. Która wersja jest prawdziwa?

[rbit9n]

nie wiem, ale tako rzecze Steve Anchell w wydaniu trzecim, zmienionym:

FORMULA #88
Gevaert G.262
Special Warm-Tone Paper Developer

This is a special warm-color paper developer. The image color tends toward red as the dilution is increased or as development time is extended.

- Water at 125F/52C, 750.0 ml
- Sodium sulfite, 70.0 g
- Hydroquinone, 25.0 g
- *Potassium carbonate, 90.0 g
- Potassium bromide, 2.0 g
- Water to make 1.0 liter

* For slightly less warm tones, 81.0 grams of sodium carbonate, monohydrate, can be substituted for the potassium salt.

Development times are between 1½ and 6 minutes. The relationship between image color and solution strength is as follows:

● Undiluted, the image will be brown-black.
● Diluted 1:2, the image will be brown.
● Diluted 1:4, the image will be brown-red.
● Diluted 1:6, the image will be red.
NOTE: Some papers will react in unusual and inconsistent ways to this developer.

[jerezano]

Węglan potasu można zastąpić węglanem sodu (patrz: * w recepturze).