Final tests are under way on pre-packed Pyrocat HD, I've enough chemicals to make 20-25 litres of stock. Price should (will) be under £20 for a kit to make 500ml stock or 50 litres of 1+1 to 100 working solution.
I'll mix anything if I have the chemistry, could do many litres of Sulphide Sepai toner
Good news Ian especially on the price. What about shipping costs ?