Glycin

Glycin is a versatile paper developer that produces a strong, deep black on bromide papers and brown to sepia tones on warm-tone chloride and chlorobromide papers.

Glycin immersed in LN₂ formed an amorphous product. Upon heating to –65 °C an unidentified crystalline phase of glycin was observed, which transformed at ≈ 55 °C to 2-glycin.

Glycin developers are non-staining and have exceptionally good keeping properties, but are too slow in action for general use.

The level of glycin (Table 4) in the serum and the plasma of autistic patients does not show consistent changes.