Derivan Watercolours: some contain oxgall and several a small amount of honey.
Thank you, Freia, for informing me about this matter. I checked the Derivan watercolour information sheet – and sure enough, it states there, that in some colours oxgall is an additive.
I don’t know whether they changed the formula or it was overlooked in April 2018, when I contacted the brand. Back then, the only animal ingredients in their products was ‘ivory black’ in only the Matisse range (ingredient :charred bones).
Please always check – double check the products you are interested in, better be precautious than sorry later on.
The oldest information you can find here will date back to 2017. A lot can change within three years, e.g. ingredients of products. I am grateful to you for notifying me about changes you spotted.
Source: reader mail; Derivan website; Derivan mail contact, April 2018