I’ve been asked a few times over the past couple months how I colour my soaps. One of my biggest pet peeves is seeing a store like Lush or The Body Shop branding itself as “natural”, and seeing how many artificial, petroleum-derived colourants they use in their products. That’s just not my style.
I tend to use natural colourants, ranging from naturally coloured oils to oxides. The saponification process is a bit of a wild card, in that you never know how a coloured ingredient will be effected afterwards. Apparently rosehip extract, which is bright pink, turns black turning saponification. Whoops, haha. Anyhow, here’s how I colour my soaps, without the use of any artificial dyes.