A two-colour risograph-style poster: every element is a halftone disc whose size is its density. Ink one prints the measured densities, ink two the noble metals' neighbourhood, overlapping where they meet. Each reprint drifts the drums a little, as a real riso does. Electrum's two metals, gold (19.3) and silver (10.5), are marked.

LIT densities at room temperature (gases at 0 °C, 1 atm) from the mendeleev data package. AMBER Z ≥ 100: predicted, never measured in bulk. ANALOGY the riso texture is drawn, not printed. Self-check: 118 cells, one per Z, densities positive, osmium (Z 76) the densest measured. ← SaPpH{{i}}on