ANSI Z535 in one paragraph
ANSI Z535.4 governs the safety-symbol format: yellow background, black border, black symbol, signal word "CAUTION" or "WARNING" as appropriate.
The ESD symbol itself (reaching hand inside a yellow triangle with a slash through it for "do not touch", or the ESD-safe variant without the slash) is ANSI/ESD S8.1.
Always pair the symbol with text — symbol-only signage is harder to defend in audit findings.
Label stock that survives the shop floor
Three grades work in industrial environments. (1) White or yellow vinyl, 3-5 mil, permanent acrylic adhesive — survives wipe-down and forklift abuse on equipment marking.
(2) Aluminum-faced polyester — used for permanent EPA-perimeter signage and high-heat zones.
(3) Paper labels are not industrial-grade; use only for inventory tagging on cartons in a clean indoor environment.
Bulk pricing brackets
Standard 1×3 inch vinyl ESD label: $0.10-0.20 each in qty 100.
Qty 1,000 case: $0.04-0.08 each.
Pallet quantity (10,000+ labels): $0.02-0.04.
Custom artwork (your company logo plus standard ANSI symbol) typically adds $200-500 in plate fees and a 2-week lead time. Most EMS operators buy a standard kit (perimeter placards + workstation labels + container labels) once a year.
What OSHA actually requires
OSHA does not have an ESD-specific posting rule. It does require that hazards in the workplace be labeled and that workers be trained on what the labels mean.
Inside an EPA, ESD signage is part of the documented ESD control program (per S20.20 or 61340-5-1).
At the EPA perimeter, ANSI/ESD S8.1 mandates entry signage. Inside, label every ESD-sensitive workstation, every tool, and every storage location.
