印刷纸封壳：硬皮儿童书籍常用的修饰方法。书壳的包面材料是经过印刷和裱胶的纸。
Printed paper case (PPC) : a common finish for hardback children's books, where the covering material over the boards is paper which has been printed and laminated.
注意，封胶其实是很软的，并不是硬塑料。
封釉——100圈套，那仅仅硬蜡之类的东西，需求用高温溶解才会亮光，这个进程会造成漆层过热内伤。
12-100 seal trap, the only hard wax like, demand for high temperature dissolution will light, this process will cause overheating of internal coating.
封釉——100圈套，那仅仅硬蜡之类的东西，需求用高温溶解才会亮光，这个进程会造成漆层过热内伤。
12-100 seal trap, the only hard wax like, demand for high temperature dissolution will light, this process will cause overheating of internal coating.
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