Applying the chalk is cumbersome and takes a long time for every strand. The thin pieces of chalk breaking through easily and make applying any easier. One must often go through the hair so that the color is added while the chalk pieces thin strong and break off. For dark hair, the products is not recommended, although it is so expressly advertised on the packaging. Unfortunately, the colors do not come to bear on dark hair.
Now for the most negative point. After applying, I realized that the whole bathroom on all faucets, tub, toilet, sink and floor, a fine film has dropped from chalk dust (Our bathroom is fully furnished with dark tiles). Just on the hairdryer and straighteners. Ergo the whole bathroom needed to be cleaned up and down to hair dryer and straighteners still sticking fine particles of chalk to the dying process from above. For me more frustration than anything else and therefore have no recommendation.
