Found 18 Board CC0 textures in library

Blackboard

Cardboard 001

Cardboard 002

Cardboard 003

Cardboard 004

Chip 001

Chip 002

Chip 003

Chip 004

Chip 005

Chip 006

Chip 007

Chipboard 001

Chipboard 002

Chipboard 003

Kitchen Wood

Paper 005

Wood Chips OSB 7