QoR watercolors (pronounced core and meaning Quality of Results) are made by Golden Artist Colors and feature an exclusive Aquazol binder used in conservation. This creates vibrant, intense colors with more pigment density than traditional watercolors, and they stay brilliant even after dry. This formulation provides exceptionally smooth transitions, excellent glazing qualities, and greater resistance to cracking or flaking. The Earth Colors set includes 5ml tubes of Naples Yellow, Transp Brown Oxide, Venetian Red, Sap Green, Indigo, and Raw Umber Natural.