A friend of mine is a fashion designer and he suggested these dyes for kombucha, as they are very durable and can be applied cold, fixating to cellulose. He said it’s the best he has found for colouring in a nature friendly way as he calculated you would need a lot of food to colour on a big scale with beets or onions eg.I know in this he didn’t consider dyes also could be made of food waste. Anyway these are dichlorotriazine dyes, on which i found this. But I have no idea what that means in terms of impact on the environment/ecological footprint.
Does any of you know more about this or how to research this? Is the chemical process worse than the food use or is it safe to say that these dyes are nature friendly?