Earth Pigments Masterclass: Why a Working Palette Still Starts Here

Technical Studio Session · July 30, 2026

Every painter has picked up two tubes labeled the same color and found they mix nothing alike. This session explains why — and what that means for the rest of your palette.

Earth pigment is a description of a working relationship, not a fixed identity. Three structurally distinct mineral families share the name while behaving nothing alike, and the name printed on a tube tells you far less than the Colour Index code beneath it. This session works through what actually determines an earth pigment’s color and behavior, what independent analytical testing has found in the current commercial market, and why a disciplined earth-pigment palette does mixing and modeling work that bright synthetic pigments cannot replicate as efficiently — held to the same conservation-science standard as the rest of the Technical Studio Session series, not rules of thumb or “old masters secrets.”

In this session:

• What determines an earth pigment’s color at the mineral level, and why “raw” and “burnt” describe processing history, not a promise of hue
• How to read the Colour Index, and why it identifies composition rather than color
• What the peer-reviewed analytical literature actually finds in commercial earth-pigment products, and what that means for choosing a supplier
• Why starting a mixture from earth pigments shortens the distance to a believable low-chroma target — the neutralization tax
• How oil absorption connects earth pigments to the four-cause sinking-in framework from the June session
• What conservation imaging of a Vermeer underpainting reveals about earth pigments doing structural work beneath a refined final surface

Recorded live on July 30, 2026. Members have access to the session recording, a one-page studio handout, and access to the Painting Best Practices community for follow-up questions.

$35 · Free to Artisan members