I've recently stumbled on some information concerning the use of acids with first generation cp's and wanted to verify.

I'll often use an bha, and then apply my copper (currently 2nd gen) after a half hour wait.
Is it true that the first gen (GHK) cp's should only be used on opposite ends of the day from acids?
are there stability issues even after 1/2 hr?

thanks

Try to keep GHK and acids at opposite ends of the day. GHK is rather fragile.

good to know.
- thank you