Quote Originally Posted by rstobbe View Post
Well, impossible might not be the right word. I get sodium metaborate from Fototechnik Suvatlar in Germany. You can see a list of products from them on Wolfgang Moerschs site https://www.moersch-photochemie.de/content/rohchemie

Afaik they do not have an online shop, but a phone call or an email will do. They are pretty responsive and willing to help. I do not know if they ship raw chemicals international.
thank you!