Finnish plywood manufacturers seen at Lusto museum in Savonlinna
https://www.koskisen.com/koskisen/thin-plywood-and-veneers/
Koskisen makes very fine birch ply and veneers including a very flexible 2 ply. Can be laser cut and bent to shape. Pale surface could be coloured.
Matt papers for inkjet printing – rice paper
https://www.hahnemuehle.com/en/digital-fineart/digital-fineart-collection/matt-fineart.html
Thin translucent fabrics for inkjet printing