Embossing nyhuv txhais tau tias nws yog protuberant ntawm tus qauv luam, uas muaj ib tug kov lawm.Qhov nyhuv emboosing tau luam tawm los ntawm peb cov ntawv luam UV, siv tus cwj mem dawb uas sau tib lub voj voog ntau zaus, ua ib cov nyhuv protuberant thiab ces luam xim xim rau ntawm cov qauv.Los cov nyhuv embossing, cov duab zoo li ntau qhov tseeb.Thiab cov neeg muas zaub nyiam sau nrog cov nyhuv no.
