Wallace Seymour Vintage Watercolour Blue Verditer (Copper Carbonate)

Blue Verditer (Copper carbonate)
Synthetic Copper carbonate, produced in hand-made process, using Copper salts with wet lime (Buxton, Derbyshire) and water from Sheffield: blended at very cold temperature to develop the finished pigment. Bright but delicate blue, with crystalline, granular structure. Transparent.