It is whitening chemical in powdery form. You can always get it where they are selling paint chemical, or rather industrial chemical. Just ask of titherni it will be given to you. It performs the function of making sure that you with paint is shining and not dull. This is the secret of some big names in painting industry. We shall give you the ratio down the line. It is only used when you are producing with paint. That does not mean you cannot use it in other colours but the function is more significant in white paints.