1+39 is the only dilution I use for HC110, because stonger dilutions cause burn-out in the highlights (in my system). I always develop Tri-X exposed at 400 for 6 minutes at 20 degrees C; sometimes half a degree more. It's for a condensor in a Beseler (which is not a very contrasty condensor). I agitate the first 30 seconds and then 5/30; no pre-soak with 35mm. Beautiful results, always content. I print on grade 2, mostly to finish with Selenium. This procedure is especially suited for long brightness ranges of say 8 stops, but with VC-paper I can manage lower contrast situations with this too.(posted 9016 days ago)