Quote Originally Posted by RPC View Post
I have tried freezing color developers and it caused the ingredients to visibly separate. Then, upon thawing I had to shake it up to make it uniform, further oxidizing it. I don't recommend it. Mixed developers keep a long time if stored unfrozen in full, tightly sealed glass or high quality plastic bottles. That is the best way to store them.
It's the "full" part that is difficult if mixing partial quantities, unless you own a bottle store.

Looks like Freestyle is still selling Protectan (which I had a hard time finding before - thought it was gone). Someone also mentioned a while ago that they use butane lighter refills. Can someone confirm that a standard butane spray (like Ronson) contains no other chemicals that should not come into contact with C41 concentrates?