Patent ID: 7185601

Claim:
A chemically sensitive warning apparatus comprising: a body having opposed, first and second major surfaces, the body having at least one first indicator comprising first warning indicia visible to an individual viewing the first surface to provide a visual indication of a possible danger, said first warning indicia comprising a repeating pattern of markings along the majority of the length of the body; at least one second indicator, different from the first indicator, the at least one second indicator comprising at least one chemical indicator mounted to the body and responsive to the presence of at least one chemical to provide a visual indication of the exposure of the chemical indicator to the at least one chemical, the visual indication being visible to an individual viewing the first surface; and a transparent layer overlaying the at least one second indicator and adhering directly to the first surface, the transparent layer being made of a fluid-impermeable material having perforations adjacent the at least one second indicator to allow a chemical to contact the at least one chemical indicator through the transparent layer.