This product is especially designed to make a deep black to black or very dark clothing. The result is flawless provided it complies with the requirements. All materials are not tinted, only cotton, linen, silk and viscose can be tinted. Synthetic fabrics, labels, sewing son etc. can not take the dye. If the garment is stained, the stains are still visible. If you want to use it on a colored garment, it is better bleach the cloth with bleach before dyeing. So take the time to read the manual before use. With this box, I refreshed two black pants that are now as good as new, nice money saving. I am doubly pleased because when I received it, there was a small hole in the bag and the powder was spread in the package without damaging anything, thankfully. I have expressed to Amazon customer service immediately sent me a new bag, without charge or even that I have to return the old one. Now that's service. I spent time writing this review to you. If you enjoy and that this has been helpful, thank you to let me know by checking YES below.