Odd art thought of the day

[Proginoskes]

Handwavium is WHMIS classes D-1 (Poisonous and Infectious Material (material causing immediate and serious effects), symbol a skull over crossbones), D-2 (Poisonous and Infectious Material (material causing other toxic effects), symbol a 'T' whose vertical narrows to a point, and a small circle under the point), and F (Dangerously Reactive Material, symbol a glowing test tube embedded in an 'R'). In Canada, and probably among Canadian expats in Fenspace, containers of Handwavium would have those three symbols and a text "WARNING: HANDWAVIUM" label. The triangle-bang BA suggested is already in use as a general "CAUTION" or "WARNING" symbol, and is generally placed next to important text (like "WARNING: HANDWAVIUM").