anyway, they are lovely and helped me out so much with my tulip drawing. yes, technically you only need a few colors on the spectrum to make any color you want. but i must say that technically, it is so much easier when they are already "mixed" for you.
the pencil case came from cheap joes and is so much better than keeping them in the original tin. it has 2 sleeves, so all 120 fit and it zips up really tight. perfect for traveling.