milk_shake Temporary Copper Colour Treatment. A direct cosmetic colour that can be used at home or in the salon to colour, condition and protect the hair. The copper colour is temporary and has the ability to correct difficult technical hair problems. A direct cosmetic colour that can be used at home or in the salon to colour, condition and protect the hair. The colour is temporary and has the ability to correct difficult technical hair problems. The colour duration is variable and depends on the structure and porosity of hair, on the type of specific products used for cleansing and conditioning, and on the exposure to colour fading agents like sea/swimming pool water. The product testing showed that the average colour duration is 8-10 hair washes using specific products.