In our own tests and those reported by customers, the paints washed out easily at 30°C or 40°C.
However, the type of fabric also plays an important role. That’s why we generally recommend not wearing best clothes and using a craft apron when painting. If paint does get on clothing like a T-shirt or sweater, do not treat it with water right away. Instead, let it dry completely, brush off any residue, and then wash as usual.