Among all decorative cosmetics items kajals are the easiest to make except for the need to be extremely meticulous about GMP and hygienic in the lab.
These kajals are filled in our all-natural jumbo pencils. You can fill them easily from the spout of a beaker and do not need any specific instrument.
Although this is a waterless formulation and basically there is no place for contaminants to grow, still we are working with clays and activated charcoal which are all rather susceptible to contamination. This is why you need to source your powders from a reliable supplier and preferrably choose thermally sterilized powders. The rest is as easy as making a balm
Make sure all your instruments and beakers are sterilized before stating to work, This product is going to be used around the eye and you don't want to cause (heaven forbid) any infection.