Its ascent to the top of the warning-symbol heap has been relatively swift. Though the skull and crossbones has been around since the early 18th Century, the biohazard symbol was created by a Dow ...

In the test, we first offered 6 kinds of candidate for biohazard symbol marks for 300 citizens of 25 cities, and furthermore, we showed the character of craft foods · Mr. Peanut And the fuel ...