Be sure to read this section carefully. Permanent Haircolor Permanent is just what it means. This makes a 'permanent' change in the pigment of the hairshaft. All hair that has been colored in this way has the natural color pigments irreversibly chemically altered. It can be one visit or many visits to the salon to try to correct a bad color job, it is expensive and is hard on the hair to varying degrees.
Single process means that the color is lifted and deposited in one step.
It lasts varying lengths of time depending on the product. Suitable for amateur colorists. This is definitely a pro-only process. Some are capable of lifting or lightening one level. This means that you must be perfectly honest to yourself and about yourself and the factors that enter into hair coloring.