In reply to CurlyStevo:
"Static" is just what we used to call "semi-static", which is also a slightly old-fashioned term now, industrial suppliers generally call it LSK (Low Stretch Kernmantle) now. It's all the same stuff - rope that conforms to the EN1891 standard. EN1891A for normal ropes, EN1891B for less hard-wearing lighter weight ones (such as you might have sitting in a rescue kit in the expectation that if you ever had to use it you'd probably throw it away afterwards).
> I guess the price could be one reason climbers don't buy the black marlow very often - that and the colour....
And that it doesn't conform to EN1891 because it's not stretchy enough. (The EN standard specifies a maximum impact force the same way the standard for dynamic ropes does, so it actually requires a certain minimum amount of stretch.)
Marlow test 'Marlow Black' rope to an internal standard of their own instead of the EN one and sell it for abseil use *only* - ie: not for rigging etc., and definitely not for SRT. In a general purpose rope (for those of us who aren't doing stupidly long fast abseils out of helicopters with guns) a little bit of stretch is a good thing.
Not all black ropes are Marlow Black though, obviously. Lots of other manufacturers make fully EN-1891A compliant black static/semi-static/LSK/whatever ropes for police/military/hut-hut-hut-hut use. Eg: Beal Intervention.