Tim Et. Al., Glass is the best container for darkroom chemistry. After that,
PET (soda) bottles would work or barrier packaging. The problem with most
plastics is that they are permeable to oxygen and carbon dioxide which will
cause developer oxidation and pH change from carbon dioxide pick-up. Avoid any
type of polyethylene (milk bottles) since it has all of the barrier properties
of a screen door. Oxygen and carbon dioxide do not hurt milk.
Howard Efner
73 de KF5RGU
On Dec 2, 2016, at 1:02 PM, Tim Daneliuk wrote:
Call all Chemists (Howard that means you, et al)
It is well recorded that darkroom chemistry is best stored in dark glass
bottles
As I understand it, the plastic used in things like cubtainers allows oxygen
passage and thus oxidation.
So are NO plastics OK for storage of, say, developers? HD Poly? LD Poly?
Anything at all?
For the record, I keep developers in glass, but fixers get stored in the
gallon jug the original distilled water got shipped in.
Just curious because I saw a lovely catalog of industrial plastic containers.
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