Watercolour paints are relatively all transparent, they make it possible to create a transparent picturesque layer through which white paper works. The rays of light, reflecting from its surface, seem to illuminate the painting itself, from which it seems so luminous to us.
TRANSPARENT, SEMI-TRANSPARENT, OPAQUE PAINTS
Oils for washes- opaque or semi transparent? : r/minipainting
WHITE NIGHTS WATERCOLOURS
How to read the labels on your new paint — Anna-Carien Goosen
Watercolour pumpkin by Elena Bazanova
Plein air watercolour painting with Elena Bazanova.
A guide to transparent and opaque paints - Artists & Illustrators
Watercolour paint v8.1
Atelier Interactive Acrylic Paint Series 2, Transparent Yellow- 80ml – Lincraft
WATERCOLOR TECHNIQUES