Second experiment with a milk-carton cardboard size 7"x10". This time prepared with two layers of budget white gesso. The cardboard still ate half of the gesso, guess I will need three layers or quality gesso next time. In all, the painting went a lot better after applying the liquid white.
Hardest part here was getting enough white into the stream and into the clouds. This time, thanks to the gesso I think, the scriptliner more or less did its job.
More experiments soon with these kind of cardboards.
Yes, a six pack of milk bricks is sold here (from a certain brand) with a cardboard between them, some 7"x10".
I saved some for my daughter (the better artist in the house) for creative purposes but she doesn't use them. That's how I got the idea to use them as cheap canvasses for creations I really don't fancy that much. It's a good and very cheap alternative since my regular budget canvas store is closed because of lockdown.
I think indeed you are right, multiple layers of gesso will make a solid foundation. I already noticed progress in that compared to the first cardboard painting I made.
Thanks for advicing!
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Milk carton?! I’m a big fan of painting on ‘waste’ card, I use 2 or three coats of gesso, then I usually glue or tape my work surface onto a larger board for added stability. Gesso can vary in structure, I find a few thin coats dry quickly and cover better than one or two thick coats.