How Long Do The Hair Dyes Last in the Bottle/Tub?
If unopened Special Effects, Manic Panic, Directions & Stargazer Semi-Perm Hair Dyes last at least 30 months from date of manufacture(shelf-life). Once opened these dyes should last a minimum of 12 months with no adverse reactions to hair providing they are securely sealed after each use and stored away from extreme heat or cold and sunlight etc. Crazy Color Hair Dyes last at least 30 months from date of manufacture (shelf-life) and are considered by Renbow to be a one-use application. With some brands the dye results may vary slightly the longer the dye is left from initial use/opening and all dyes should be mixed/stirred before using again as some colour pigments may seperate over time.
