A film series and discussion forum dedicated to the science and practice of natural dyes and pigments using sustainable methods.
On the DVD, Michel uses vinegar for the mordants, I am working on a commercial scale, is there a substitute?
Yes, of course, it is much easier to use the sodium acetate from Maiwa. Then, the proportion of alum doesn’t change in the formula, but the sodium carbonate and the vingar are replaced by socium acetate. e.g.: for 1 litre of water, dissolve 50g of alum + 50g of sodium acetate- this mordant is very concentrated and used for printing. For immersion dye, it can be diluted with water.
I have followed the 1-2-3 Indigo recipe with fructose, it would be helpful to have some info on what to do when it doesn’t work….mine isn’t working and I am wasting too much indigo trying.
The best solution is to add more sugar and wait for about one day: the the sugar is converted in lactic acid: the pH is decreased while the reduction is very strong