My latest ink is Diamine Ultra Green. This is a bright 'grassy' type of green. It's very nicely balanced shade, not too much yellow and not too much blue. This one is brighter and lighter than Delamere Green and is very slightly less yellow than Woodland Green. I filled my Pilot CH 92 with it over a week ago, but because it has a F nib, I have always found it a hard starting pen. It soon overcame that and wrote very well with Ultra Green. The water test on the review form shows this isn't a waterproof ink but it shows there is some water resistance.Bearing in mind the paper I use is thick with a shiny surface, and I used a F nib, this ink took 12-15 secs to dry.It flows through the pen well and lubricates the nib well. Once I got the pen going I saw no skips or hard starts while I did swabs and dry time tests.It is currently available in 80ml glass bottles, 30ml plastic refill bottles or cartridges.Diamine sell it directly to end-users on their web-site.It's a reasonable price.