Patent ID: 8530378

Claim:
A method for rendering unreadable indicia printed on a label, the method comprising: attaching an information destruction strip to at least one of a label support structure having disposed thereon a thermally responsive label having indicia printed thereon and a thermally responsive label having indicia printed thereon such that the information destruction strip is in a thermally conductive relationship with the thermally responsive label, the information destruction strip sized to cover at least the indicia printed on the thermally responsive label, the information destruction strip comprising a microwave activated material operable to generate heat when exposed to microwave energy; placing the label support structure, having the information destruction strip attached to the at least one of the label support having disposed thereon a thermally responsive label structure and thermally responsive label such that the information destruction strip covers at least the printed indicia and is in a thermally conductive relationship with the thermally responsive label, in a microwave oven; activating the microwave oven such that the microwave oven emits microwave energy, whereby the microwave activated material absorbs the microwave energy and generates heat of sufficient intensity to heat the thermally responsive label to a temperature sufficient to cause the thermally responsive label to react and render the indicia unreadable.