Hello everybody,

I am desperately looking in Chiang Mai or wherever in Thailand for :
1. Mineral powder pigment for oil painting
2. Blanc de Meudon aka whiting chalk powder
Could anybody help me ?

Chiang Mai isn't a very good place to buy professional quality artists' materials. There are a number of places selling art supplies, but what they have is for the most part student grade.

Mineral powder pigments could be obtained from industrial supply houses. They might be suitable for certain types of craftwork, but they would be too coarsely ground for fine arts use.

Are dry pigments necessary for your work? If you could use tube oil colours instead, Lefranc&Bourgeois are available at Udompon [sign in Thai] on Ratwithi near the UN Irish Pub.

Blanc de Meudon I have never seen here. If you need it as an ingredient for making gesso, then perhaps you could substitute good quality plaster of paris, which is easy to find - even in hardware stores.

Good luck with your projects.