Know your products demographic. As far as the development of the products pigment, wearability, and durability are key. You need multiple options, for example a large and unique color palette, and multi use products. Search out raw materials vendors and experiment with your products to find the best formulations. Test them out and make sure the quality is high.
Seek out a chemist that offers "private labeling" or make up your own formula and take it to a package designer. Be prepared to offer sampling to the public. Private labeling companies offer the best alternative; however, it is a costly venture. Start with word of mouth advertising and samples.
First of all survey about some beauty tips and cosmetics. Try to put some cosmetics of 4 or 5 companies at reasonable prices. Take orders first and then sell your product.