Recently, I had an eco dye session with 24 1. graders! - 50% chaos - 50% fun - and here is the result:
I pre-mordated the silk in a little bit of alum and cream of tartar (vinsten). Leaves, flowers et.c. was placed (with more or less care) upon the fabric. The fabric was then rolled tightly around a stick and secured with cotton yarn. Boiled in the school yard in an enamel pot on a bonfire for about an hour. Opened after two days (because longer is impossible to wait for small people). We're going to make table runners, wall hangings and perhaps an advent calender with the fabric - combined with some solid coloured natural dyed silk fabric - no madder!