So thats why they wont sell me a kg of the stuff! Thank you.
Anyway 60 minutes darkens things up substantially but only gets me 1 step extra, I reach paper white, or in this case yellow, on step 18. Tissue is all finished now. compared to the same tissue spirit sensitised with 2%AD its about 3 stops or more slower.
Fairmount Chemical Company still exists, anyone care to ring them?