Green Earth (Terre Verte)

Genuine green dirt — the underpainting of every Renaissance face.

Color

Soft sage to mossy green-grey

Binder

Gum arabic + honey

Some clay really is green. Find the right dirt and you have a soft sage paint.

▸Look near old quarries, slate beds, or copper-bearing rock for greenish clay.
▸Wash it the same way as river clay — sand out, pigment kept.
▸Renaissance painters used it to underpaint skin tones.

Steps

01
Crush the green earth to coarse grit, then grind to fine powder.
02
Slurry the powder in water; let coarse grit sink 30 seconds.
03
Decant the green cloudy water; let it settle overnight; pour off and dry.
04
Mull the dried green mud with water, then with binder.
05
Pan up and dry.

Materials

— A handful of greenish clay or weathered greenstone (look near old quarries, slate beds, copper-bearing rock)
— Mortar and pestle
— Jar of water for levigation
— Gum arabic + honey binder

Safety

Moderate Risk

Involves dust, mild chemistry, sharp tools, or solvents. Use PPE and ventilate.

Hazards identified

Airborne dust — respiratory irritant

Quick checklist

☐Wear an N95 / FFP2 mask when handling dry powders
☐Mix in a tray to contain dust; wipe surfaces wet
☐Work in a ventilated area; keep food and drink out of the studio
☐Read each material's safety data sheet (SDS) before starting
☐Have water, soap, and a first-aid kit accessible

Heuristic guidance derived from listed materials. Always consult each material's safety data sheet (SDS) and a qualified instructor before attempting.

Notes

Green earth (glauconite or celadonite) is rare but unmistakable. Lightfast for centuries.