Harad Powder is used basically for textile dyeing by soaking the fabric in harad powder water and then block printing with rust water. During this whole process, strong bond is formed on fabric between tannic acid present in hard powder and rust to form ferric tannate which gives black colour on fabric. This whole process is for textile dyeing but this can also be used for making ink for screen printing on paper to reduce carbon footprint as no carbon contents are used for making this ink. This can also be used as an alternate to black inks.