It is possible to visit our museum for groups of people. If you
contact us by e-mail, tell us who you are and the reason for your visit, we will give you an answer to your request.
It is not possible for us to answer this question, because we can not know what the specific ingredients are of the colours of other manufacturers. You will have to test it yourself.
If you visit our web-site, look at the colourcharts, select a colour and click on it, the information will be there.
If the word ‘extra ’ is used it means that it is a traditional colour made from a lightfast pigment.
