Frederik, I seem to recall that the Borak was a bit heavier than your formula, at least the one that I use... I will have to look up my formula that I use and get back to you. I use it with TXP @400, PXP at 100, Agfa 400 and 100 and process for 3 min and 3 min but with the t- grained stuff it is 5 min and 5 min... I'll get back to you! Cheers, Scott(posted 8342 days ago)