| 摘要 |
<p>Microvoid-containing sheet material of the type which displays visible indicia when a liquid applied to the surface fills the microvoids. The improvement lies in making the liquid-receiving surface from particles held in pseudo-sintered juxtaposition by a thermoset binder and ensuring that an image force value of at least 200 grams-force is attained, thereby rendering the structure resistant to inadvertent marking when it is subjected to heat, pressure, or both. </p> |
