| 摘要 |
<p>The device for detecting, assessing and signaling thawing of deep frozen foodstuff includes a stratified disc (1), which can be applied to the product to be checked, and formed by a first support (3), a second support (7) and impermeable transparent films (8, 9). A pattern (4), made on the first support (3) and extending up to a central display zone (6), is obtained by application of water expansion facilitating substances. Coloring water-soluble substances, which assume a well seen color when in contact with liquid water, are also applied to the display zone (6). The second support (7) has printed thereon information about the disc (1) use, and allows to see the display zone (6). The transparent and impermeable films, respectively upper (8) and lower (9), are fastened to the upper surface (3b) and to the lower surface (3a) of this first support (3).</p> |
