That is nice work Amar,
since it's all black ink or black pigment and painted on location it fits in with this fourm.
"Paintings can't use black pigment, all work has to be done on location."
It's the colored paintings that can't use black pigments to darken colors. I think you understood that.

Merry Christmas and welcome to the Painting on Location with Color Forum Amar.
Although this painting has abstract qualities, it's actually a realistic mono-toned location painting. And well done!