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Five generations of chemists in the Blockx family have been working since 1865 to perfect the Blockx Oil Colors. Today they are still ground on stone rollers and mixed with poppyseed or linseed oil, and no additives or fillers whatsoever.
Color Swatches created using heavy application/medium application/50% tint and were applied on acrylic primed canvas (7 oz) material.
2PbCO3Pb(OH)2 or 4PbCO32Pb(OH)2PbO
Lead White is a fast drying, heavy consistency, flexible, opaque white with a very subtle reddish-yellow undertone and excellent covering capacity. Most artists stopped using this pigment over the last century because of its toxicity, but its working properties are positive enough to keep some artists using it. It is the most structurally sound white for underpainting. Lead White is quick drying, and it will help accelerate the drying time of any color it is mixed with.
Lead White has excellent permanence and lightfastness. However, it may become discolored over long periods of time.
Lead White is highly toxic by both inhalation and ingestion
Lead White has historically been the most important of all white pigments. The use of this pigment dates back to the days of the ancient Greeks and Egyptians. It was the only white used in European easel painting until the 19th century, and it is one of the oldest synthetically produced pigments. It has been mostly replaced by Titanium White and Zinc White, depending on the opacity the artist desires.
Biacca, Ceruse, Cremnitz White, Dutch White, Flake White, Flemish White, French White, Krems White, London White, Nottingham White, Roman White, Silver White, Slate White, White Lead.
Zinc White is the coolest white, and it has a cold, clean masstone and a slightly bluish tint. It has less hiding power and is more transparent than other whites. It dries slowly and is good for painting wet into wet and for glazing and scumbling. Zinc White is neither as opaque nor as heavy as Lead White, its covering power is not as good, and it takes much longer to dry. However, it does not blacken when exposed to sulfur in the air as Lead White does. It is very valuable for making tints with other colors. Unmixed Zinc White dries to a brittle and dry paint film that may crack over the years, so it is not good for frescoing. It is more transparent in acrylic form than Titanium White and is the most commonly used white with gouache. Chinese White is a version of Zinc White appropriate for opaque watercolor techniques.
Zinc White has great permanence and lightfastness.
Zinc White is moderately toxic if ingested and slightly toxic if inhaled.
Though historians are divided on who first isolated the element zinc, they agree that it was first suggested as a white pigment in 1782. Zinc White was accepted as a watercolor in 1834 and was called Chinese White due to the popularity of oriental porcelain in Europe at the time. Ten years later, a suitable oil form was produced. By the early 20th century, it had improved to the point where it was an acceptable alternative to Flake White.
Chinese White, French White, Permanent White, Silver White, Snow White, Zinc Oxide.
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