How Colorifix make sustainable colours

I’ve just finished a rather good book called The Secret Lives of Colour, by Kassia St Clair. It tells the background stories of dozens of different colours, from woad to khaki to avocado green. It’s full of fascinating stories, but a couple of things jumped out to me.

One of them is that we take vibrant colours for granted. Most of history was considerably less colourful, with a very small range of reliable dyes for fabrics or paints, often at horrendous expense. Some of them were reserv...