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Wella Koleston 20 Volume 6% Cream Developer

What it is: Wella – Koleston Perfect Creme Developer 20 Volume 6%. What it does: Provides a color protecting barrier on the hair fiber, resulting in a longer retention of color. What else you need to know: Salon Exclusive Formula For Professional Use Only For Koleston Perfect Haircolor Mix Koleston Perfect Creme with Koleston Perfect Developer to guarantee best color results. For Koleston Perfect the ratio of developer is 1 to 1. These tubes are 2oz. therefore you use 2oz. of developer per tube ….So for 1 ounce color you need 1 ounce developer. Product Options Available are as follows: Size : 1 Gallon – Wella Koleston 20 Volume 6% Cream Developer Size : 33.8 oz – Wella Koleston 20 Volume 6% Cream Developer