I was experimenting with the
Derwent Coloursoft range, though I had no idea which type of paper they should be used on.
I did two quick sketches of my darling girl poking her head out from under the duvet - one on my usual watercolour paper of Arches Aquarelle 140lb rough - and the other on WHSmith pure white cartridge paper 135gsm.
Arches Aquarelle

WHSmith White Cartridge Paper

These were only quick sketches so I could find the paper I was happiest with. (its cartridge) Hopefully my next piece will be more artistic !