I use tyvek wristbands to keep track of which skein is which. They are writable and waterproof, although I usually don't tag the yarn until after it's dyed because i doubt they're high heat proof. I have some skeins that have the wristbands on for years and no issues. If I'm doing color experiments then I just write which dye book and what page number of the recipe on the band as well as which base. When I name it I'll add that too.
I use tyvek wristbands to keep track of which skein is which. They are writable and waterproof, although I usually don't tag the yarn until after it's dyed because i doubt they're high heat proof. I have some skeins that have the wristbands on for years and no issues. If I'm doing color experiments then I just write which dye book and what page number of the recipe on the band as well as which base. When I name it I'll add that too.