The Cultivators Black color provides bright color and volume while strengthening hair. They contain 100% natural dyes and conditioning, providing long-lasting color. If the chemical dye has been used on the hair, leave the hair on for at least 5-6 weeks before using grower herbal hair colors on your hair. Please note that gray hair is notoriously difficult to cover and you may have to apply 2 to 3 applications to cover gray hair completely. As the product is completely natural, this can be done on consecutive days without the risk of damaging the hairs. A strand test is recommended before coloring all hair. For a darker or more intensive color result, it is sometimes necessary to color your hair twice. However, you must wait at least 12 hours before coloring a second time. Pour the contents of the sachet to be used into a bowl, add 100 ml of warm water (35C) for each sachet. Mix until obtaining a homogeneous paste. Immediately apply the paste to your hair evenly. Cover the entire hair with the plastic cap and leave the product to act for 60 to 90 minutes depending on the desired color intensity. Rinse hair thoroughly with clean water. This pack contains: 4 sachets x 25g of organic herbal dye powder, 1 pair of disposable gloves, 1 plastic cap.For external use. Avoid the eye contour area. Do not use on abraded skin or wounded scalp. To perform a pre-tolerance test (recommended before using the dye for the first time): rub a small amount of the prepared product (paste) on the inside of an elbow or behind an ear. Leave it for 24 hours. If no irritation or allergic reaction occurs after 24 hours, the product can be considered safe. Note: 100% organic and certified vegetable product. The colour is only a reference (applied on previously bleached hair) and may vary depending on the harvest, the type of hair on which it is applied, the previously applied colour, the action time and the temperature. Test on a lock of hair first to decide the optimal time and temperature. The product will not lighten the hair because it does not contain oxidants or bleaching chemicals. Keep out of the reach of children. Do not ingest. Do not use to dye eyelashes or eyebrows. In case of accidental contact with eyes, rinse with plenty of water.Close tightly, protect from heat and direct sunlight.