See Portrait Example . A light touch will pay off. Unison Pastels are a new product of very high quality, made in England. You will not necessarily be able to match the above colors with other brands. Unisons are not made by adding white or black to control value, as other brands do.
Colors are much more rich.
No, I don't work for Unison or their distributors. I just respect their product. Try calling your better local art supply stores.