Flake White and Lead White are the same pigment — basic lead carbonate — known by different trade names. "Flake" refers to the flake-like shape of the lead carbonate crystals as they form on the lead strips. This is the white of all Western painting before 1921 — the luminous whites of Vermeer, Rembrandt, Titian, and every Old Master. Its replacement by titanium white transformed the handling and optical character of oil painting.

Warm, alive, and historically irreplaceable. Painters who have used both lead white and titanium white consistently describe lead white as having a quality titanium lacks — warmth, slight transparency, and a "living" quality in the paint film. It handles differently (more plastic, more responsive), dries differently (forms a harder, more flexible film), and looks different (slightly warmer, more luminous). The toxicity that makes it dangerous is embedded in the same lead chemistry that gives it these qualities — they cannot be separated.

The gradual replacement of lead white by titanium white in the 20th century represents one of the most significant changes in the material history of painting. Some oil painters continue to use lead white specifically for its handling qualities — accepting the health risks or using appropriate safety precautions. The ongoing debate in painting communities about lead white encapsulates broader questions about artistic tradition, safety, and the relationship between material and aesthetic quality. Flake white specifically refers to the "flake" form — the natural crystal habit of the lead carbonate as it grows on the lead strips in the stack process.