When making an indigo vat, you require three things: the indigo extract, an alkali, and a reducing agent.
Fructose is a great option as a reducing agent, as it is inexpensive, food safe and easy to use.
Combine with indigo and an alkali to create a vat and create blue!
A common recipe for creating a fructose vat uses a 1:2:3 ratio, or 1 part indigo : 2 parts calx : 3 parts fructose. For example for 50g indigo, you need 100g calx and 150g fructose.
Bulk dyes such as these ones do not come with instructions - if you are new to indigo dyeing, you may want to begin with our Indigo Kit, which has the pre-measured quantities of each ingredient that you need, as well as comprehensive instructions which lead you through creating and dyeing with your first vat.