| 摘要 |
A hot-button type heat alert safety device attachable to a surface, such as metal or glass, for warning individuals that the surface is hot, comprising a thermochromic composition, a button-shaped container for housing the composition, having a convex face, the convex face overlying said composition and the container container being transparent in at least a portion of the container overlying the thermochromic composition. The thermochromic composition is shaped in a predetermined symbol which communicates that an underlying surface is dangerously hot, substantially visible through the convex face of the container, and designed to undergo and maintain a readily perceptible color change whenever the temperature of the hot surface exceeds a predetermined temperature,
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