REDKENColor Extend Magnetics Shampoo For Color-Treated Hair - Gently Cleanses & Protects Color, With Amino Acid, Sulfate-Free Shampoo

Porque unos son 6.0 or 3.0 or 1.oph que significa?

I have fine hair, does this weigh your hair down? Also, does it leave a film on your hair? Any shampoo recommendations for fine color treated hair?

I received color extend magnetic shampooo that says manufactured 04/08, & conditioner manufactured 05/01. isn't this expired or unsafe to use??

How well does this work with blue hair?