[Mike Halliday]

Anyone give any advice How you would remove this black marking from  the chair wheels?

[David Deer]

Looks like pile compression/erosion. You may lift the dirt but the mark will be there forever. I have done hundreds of these and nothing shifts it. Best results from ultrapac renovate, followed by powerburst + citraclean. Don't overwet and agitate well (even though there is very little pile to lift!). Warn the client not to expect miracles on a carpet which is basically worn out. Advise on use of carpet protectors.

[Tadgh O Shea]

Funny looking carpet with welded joints, hi Mike it looks like some type of safety flooring, for soft flooring like this i would pre spray with any micelles based product two minutes dwell time then scrub gently with some damp magic eraser pads , should sort it for you.       Tadgh

[Peter Lynch]

Looks like carpet tile to me, and compression for sure, to be sure ;~) Follow David's advice, low moisture , be careful not to melt the adhesive backing.

Peter

[premier floorcare]

http://professionals.tarkett.co.uk/products/acoustic-vinyl-heavy-traffic/tapiflex-excellence/tapiflex-excellence-65#firstsku=1207443o.tktp

[Mike Halliday]

Well it was easier than I thought

I was there this teatime doing some work  so did a test with a mild cream cleaner it just  cleaned straight off

It is a safety type hard floor not carpet