Chemically sensitive warning apparatus and method

A chemically sensitive warning apparatus comprising:

• a body having opposed, first and second major surfaces;
• at least one chemical indicator mounted to the body and operable to change colors upon exposure to at least one chemical;
• and
• at least one color reference indicia mounted to the body to facilitate interpretation of the color of the chemical indicator when the chemical indicator is exposed to the at least one chemical.

A color changing indicating assembly for indicating hazardous conditions comprising:

• a base layer having opposed, first and second major surfaces;
• at least one chemical indicator carried by the base layer and capable of changing colors when exposed to a hazardous condition;
• and
• at least one color reference indicia carried by the base layer to facilitate interpretation of the color of the chemical indicator when it becomes exposed to a hazardous condition.

A chemically sensitive warning apparatus comprising:

• a base layer having opposed, first and second major surfaces;
• at least one strip of chemically sensitive material positioned on and extending along the length of the first surface of the base layer;
• and
• a selectively permeable, transparent layer adhering to the first surface of the base layer and being permeable at least adjacent to a portion of the strip of chemically sensitive material.

A color changing indicating assembly for indicating hazardous conditions comprising:

• first indicating marking means for providing a visual indication of a hazard area;
• second indicating means for changing colors when exposed to a hazardous condition;
• and
• means for supporting the first and second indicating means.

Chemically sensitive safety tape comprising:

• a base layer having opposed, first and second major surfaces, the second surface having an adhesive coating to facilitate attachment of the tape to a surface, the first surface having markings to provide visual indication of the existence of a hazard area;
• at least one chemical indicator positioned on and extending along a length of the first surface of the base layer;
• at least one color reference indicia disposed on the first surface of the base layer to facilitate interpretation of the color of the chemical indicator when a chemical comes into contact therewith;
• a transparent layer adhering to the first surface of the base layer to maintain the chemical indicator and color indicia on the first surface of the base layer, the transparent layer having perforations adjacent the chemical indicator;
• and
• a removable protective layer adhering to the transparent layer to cover the perforations and prevent premature exposure of the chemical indicator prior to installation.