Just thought I would throw this out there. Like many, I use glycine in several of my film and paper developer formulas. The issue is, glycine does go bad very quickly as compared to other reducing agents. To make a long story short, I got very ill, could not go to my darkroom for over a year. I did not want my glycine to go bad as I had about 200 grams on the shelf.
When I purchase glycine from Photographers Formulary, I pay the extra and have the chemical placed in a dark brown glass bottles, that helps the storage issue. Longer storage has been achieved by placing the glass bottle in the refrigerator, darkroom fridge, not food fridge. As I was so sick ,I needed longer storage so placed the dark brown in well sealed glass bottles in the bottom of my deep freezer. As an added protection I placed the bottle in a ZipLock style plastic bag.
It is now some 18 months later and I am some better, went to my frozen glycine and warmed it up overnight. To my surprise the color of the glycine was almost the same color as when purchased. I Mixed up some GSD-10 and my version of Ansco's 130 paper developer. Both of the developers worked as expected.
To sum this up, for longer storage of glycine, try freezing in well sealed glass bottles. It has certainly worked for me. Now, after mixing the required chemistries, I place the glass bottle back in the freezer ratter than siting on my shelf. Always warm the bottle up overnight or condensation of moisture will happen in the bottle, nothing good will happen with moisture in a Glycine bottle.
When I purchase glycine from Photographers Formulary, I pay the extra and have the chemical placed in a dark brown glass bottles, that helps the storage issue. Longer storage has been achieved by placing the glass bottle in the refrigerator, darkroom fridge, not food fridge. As I was so sick ,I needed longer storage so placed the dark brown in well sealed glass bottles in the bottom of my deep freezer. As an added protection I placed the bottle in a ZipLock style plastic bag.
It is now some 18 months later and I am some better, went to my frozen glycine and warmed it up overnight. To my surprise the color of the glycine was almost the same color as when purchased. I Mixed up some GSD-10 and my version of Ansco's 130 paper developer. Both of the developers worked as expected.
To sum this up, for longer storage of glycine, try freezing in well sealed glass bottles. It has certainly worked for me. Now, after mixing the required chemistries, I place the glass bottle back in the freezer ratter than siting on my shelf. Always warm the bottle up overnight or condensation of moisture will happen in the bottle, nothing good will happen with moisture in a Glycine bottle.
