PET or glass bottles to store chemicals

[loccdor]

The seal of the bottle cap and amount of air inside at the top may be more relevant than the material used for the bottle. I've mainly used HDPE and been able to keep C-41 and E-6 at least 6 months and fixer over a year.

If HDPE is permeable then the thickness of the material should also matter with thinner ones being worse.

I used to use amber glass but I didn't like how slippery they were and some of them broke when filling with hot liquids in a cold sink. The heaviness is a drawback too.

Bought some StopLossBags but haven't yet tried them. I was saving them for chemicals which age the quickest.

 

[koraks]

I've mainly used HDPE and been able to keep C-41 and E-6 at least 6 months and fixer over a year.

The developer appears to store OK, but the difference shows if you compare a batch stored in glass vs. one stored in HDPE. You'll then see that the HDPE-stored batch oxidizes faster; it'll be slightly darker after a few months. It'll still work OK at that point.

I've never liked amber glass because you can't see the color of the contents. I prefer clear glass and store sensitive materials in the dark. It's all very personal of course.