The biohazard symbol was first used at the Dow Chemical Company in 1966. The company wanted a symbol that was:
- Striking in form
- Unique and unambiguous
- Quickly recognizable
- Easily stenciled
- Look identical from all angles
- Acceptable to all ethnic groups
Over 40 symbols were drawn up before this one was chosen.
This is a new sign with the following features:
10" x 15" screen printed in the classic yellow and black
Sturdy .032 aluminum sign with rounded corners and drilled hole for hanging
