Sepik Spirit Board draws on the gope and kwoi boards of the Papuan Gulf and Sepik River, where carvers worked old canoe and house timber into frontal ancestral faces. A dominant red-ochre field is incised with white-lime and charcoal lines, low-relief spirals reading as eyes, nose, and navel.

The system holds to a strict three-pigment world: iron-oxide red, white clay, and charcoal black on the painted wood itself. There is no fourth color and no smooth gradient — only carved relief, weathered grain, and bilateral symmetry carried by monumental capital letterforms.