| 摘要 |
<p>A substrate, such as a postage stamp, is provided with a layer of adhesive thereon, the layer of adhesive being further coated with a protective layer which is soluble in a solvant in which the adhesive is substantially insoluble. Preferably, the adhesive is a pressure-sensitive adhesive, and the protective layer is formed from an edible water-soluble polymer such as gelatine.</p> |
