I'm with Jeffrey on this....currently using fuji direct dupe film and HC110 diluted 1:3
and getting great results...have already made enlarged negs from 35mm and then made palladium prints....have an entire stack of enlarged 120 and 4x5 negs ready to be printed in platinum. Why go the xtra steps where there is nothing but DUSt and imperfections...this is a direct one step process!!
Best, Peter