Postcard Colouring Book, Opart
- 20 cards, each with a different design.
- 250 gsm acid-free watercolour paper, suitable for use with wet and dry media.
- Designs printed in a subtle light grey, which is only slightly visible in the finished piece.
- Spaces on the back of each card for adding a note, address, and postage stamp.
- Glue binding for easy removal of cards.