Charas is made by harvesting cannabis flowers when they are ripe and full of resin. The flowers are then rubbed between the palms of the hands or a cloth to extract the resin glands. The resin is collected and rolled into balls or sticks, which are then dried and cured. The process of making it can take several hours or days, depending on the amount and quality of the cannabis flowers. The best charas is made from high-quality indica strains that produce large amounts of resin.