Graphite and Coloured Pencil on Drafting Film (Polydraw)

I've been experimenting with doing a graphite drawing on one side of drafting film and then turning it over and working with coloured pencils on the reverse side.

This is the start of the graphite drawing. I used harder pencils 4H, 2H and just added a little B in the very darkest areas because the softer ones would smudge on the polyester surface.
I drew in the cat's eye and some of the surrounding fur making sure not to smudge the graphite.
Once I'd done a couple of inches of I turned the drafting film over and started working in coloured pencils.

You can see the graphite showing through the area not yet worked in coloured pencil. The graphite acts as a grisaille and has really increased the contrast of the piece.
Because the graphite is on the other side of the drafting film it doesn't smudge and muddy the colours.
One thing I need to keep in mind for next time is that I need to draw the graphite image in reverse so that when I turn the drafting film over I'm working the right way.
The final image is replacing the white backing board with a black one, a mid tone will work better but I can't find one at the moment.

Continuing Cat in Coloured Pencil and Acrylic

I've worked a little bit more on the cat but household tasks kept calling me today so not much progress has been made.
With the continual rain I seem to spend an awful lot of time drying paws or cleaning floors. The cleaning results from the muddy paws that make a dash to pass me when I'm already propping up a dog who has one foot in a towel. Why is it that my dogs can run and play on three legs if the need arises, but lift one leg to dry it and they either collapse, or lean so hard that both of us end up in a heap on the floor.
All except Rio that is, Rio doesn't like rain, even worse he doesn't like the ground to be wet when he needs to go out. The only way to encourage him is to go out first and convince him it doesn't hurt, this is a lengthy process. In fact you can add changing clothes and drying hair several times to my daily tasks . Yesterday it involved rounding up fish from flower beds but that is another story.