Gainers Original MC-sodium carbonate developer concentrated in glycerine

[Alan Townsend]

I never tried it.
You will get a better answer from Chat GPT if you ask it :
"Metol ascorbate film developers- what is the shelf life of the working solution."
Looks like 24-48 hrs depending on storage.

Alan, sorry to tell you of the foibles on Chat GPT. Way off. The sodium carbonate makes this developer extremely active at both processing film and self degenerating. Please use as soon as mixed for best results. I will be testing some print strength solutions using milder accelerators to improve tray life but will revert to e72 until I can do that.

 

[Alan Johnson]

OK, but one of Ryuji Suzuki's print developers with added salicylic acid and TEA was reported to last much longer. You may not care for these bolt on goodies though.

silvergrain chemicals

is anyone out there using the sivergrain products available on digital truth website.i am very interested in them due to the eco-friendly claim. a couple of questions.are they excellent products.and what are your experiences.i dont have a favorite paper yet so i am open to what papers work best...

www.photrio.com

 

[Alan Townsend]

OK, but one of Ryuji Suzuki's print developers with added salicylic acid and TEA was reported to last much longer. You may not care for these bolt on goodies though.

E72 has a tray life of 24 hours, good enough for me, but it has terrible shelf life. I can put the powders for a batch in little pill bottles, then mix with water as needed. The poor working life of MC-glycerol is about what I expected. Suzuki's print developers are way too complicated for me. From Gainers original 1993 chart, the "improved A" with 2.8g sodium bicarbonate + 1.55g sodium hydroxide per quart, or the "improved borax" with 1.7g sodium hydroxide + 6.1g borax per quart would give progressively more shelf life at the cost of lower activity. Double those amounts for print developer. For films these variation will take longer development times than the original sodium carbonate versions and also likely finer grain a the cost of acutance.