Asemic

I think that's the title I want - although my dictionary doesn't have it... strange... is it a newish word I wonder?
Details in extras
It's watercolour under pastel, measures about 75 x 55cms.
Based on this photo
https://www.flickr.com/photos/100168940@N04/24658454492/in/dateposted-public/
of a section of underground conveyor belt from the coal mining industry.
I know - not very glamorous but I take my inspiration from wherever I can.