Does the henna, regardless of colour, contain grains of sand?Updated a year ago

According to our manufacturer's laboratory, the white granules contain one ingredient, sodium percarbonate. Sodium percarbonate is an oxidising agent in the henna colour powder. This granulate is larger than the powder consistency of the henna colour and is therefore conspicuous. The granules are water-soluble and require 2 to 3 minutes to fully combine with the henna colour and dissolve.