Importance

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Abstract

A time indicating label for attachment to a tube, the label comprising:

(A) An impermeable facesheet optionally adapted to accepting a graphic before or after attachment of the label to a tube,(B) An activation layer comprising a polymer matrix and an activating agent, the activation layer in contact with the facesheet,(C) A release liner impermeable to the activating agent and in contact with the activation layer,(D) A timing layer comprising a film-forming polymer and a pigment, the timing layer in contact with the release liner,(E) A dye layer comprising a film-forming polymer and an organic solvent soluble dye and in contact with the timing layer, and(F) A base layer comprising a material impermeable to the activating agent and dye and in contact with both the dye layer and the activation layer.

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First Claim