A Handbook of Indigo Dyeing by Vivien Prideaux
This 2003 how-to has several recipes for indigo vats: zinc and lime, hydrosulfite, and bio-vat (with dates!). I found the explanations for shibori-tying techniques very clear and a good starting point to try to understand some of that beautiful work we saw in the Mary Hark -Indigo Swatchbook show we saw at the Textile Center. I also like the simple pattern for “the Bog Jacket.”