Um, I think with stock Xtol I've been using 6-1/2min @ 68F.(posted 8996 days ago)Use a B+W 091 (Wrattan 29) filter for getting the evergreens (pine et al) to become grey. B+W 092 will give the best effect. Ilford also makes its own filter, but you must have a gel holder for it. B+W 090 (Wrattan 25) gives good results, but evergreens remain black.