ORIGIN late Middle English (as a noun): from Anglo-Norman French, or from medieval Latin triallum. The verb dates from the 1980s

OK, so starting from scratch I just want to begin with what a  trial is; now we can discuss what is a "makeup/hair trial." This is your opportunity to test the performance of products & my design, the quality of the products and service, and to judge if I am suitable for you. On the other-hand, it is my chance to test the same performance and quality of design and products on your (unique) skin and hair, and to hope you find me suitable :)