檢視水印的原始碼

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|<center>'''水印'''<br><img src="https://lh3.googleusercontent.com/upVySUEBbQrK9JkPHjpzrDqnAMT1pX804L0HZDRi1oJM0Q3ZXaigT5WhjlXByp1jhcxGaZERsiMYHqV40sikSdIS4retB0XVrdtHQsbhUljIaZ0DFX6lXgMKmSlUyjcxAsEalwJi626jlCrFgVGbqQKRTUN2Kd0tv1MqUHJW1JjJ-eZHVIPcvotpQlVNKSxS5Enr-lIJO473DehzDkraKaBG-W7B_xfx7oo_G4ECirvypiMsPfrlnJgRCFo-qFijkGzipRGmzhJfOeTXyhRBUnOkl2XlDIhgMhEPVTyS85GFKYySp2_8pvQThDpQhM4LAH8TJFVEnXEhq4c65XuJkOMjn7G3PjAhV3xLWJFLcnwqNfNigMOTXeGEJjZNo65Rf7MOnRmI4PJzUtDKU_z8OeAUjWPvDjmIgwh8kX589G3m44GbDI-VjyuuraiP0Q-zAxPohrPOh8kkk9Z88EbUzehvMu-0zTpbbp5eBFVo-37J9yS2vE9bYgpY99EqciHRYyAABWlMjMnRkfrS4nGmWbcy27AfGlNFTZPYzV5i0aLumwQXoFIbZJ4JMNycccbF9CVj2nIEFUmoeqrHatkaONblb6TYQDt5ZIsC8Bi4d5BRqBskJNXQsDMT1SFugBDkAuqbTP27hUi14lEhySFhhQgLNQ_-ky6MVs3pbBOpjY2x_5PSF8ICCOpn3gOCBjHzvPzbuY5u6_cSdn7teiZqywKMMQ=w1000-h600-no" width="280"></center><small>[https://www.melvinque.com/word/word%E6%B5%AE%E6%B0%B4%E5%8D%B0%E7%9A%84%E6%B7%BB%E5%8A%A0%EF%BC%8C%E5%84%B2%E5%AD%98%E4%B8%8B%E4%BE%86%E9%87%8D%E8%A4%87%E4%BD%BF%E7%94%A8/ 圖片來自melvinque]</small> 
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'''水印'''（watermark）是一种容易识别、被夹于[[纸]]内，能够透過光线穿过從而显现出各种不同阴影的技术。水印有时也会在反射强光时或者在暗色背景上方时被看到。此种现象是由于纸张厚度或者纸张的密度变化所引起的<ref>{{cite book |last1= Biermann|first1= Christopher J. |title= Handbook of Pulping and Papermaking |edition= 2 |year=1996 |publisher= Academic Press|location= San Diego, California, USA|language= |isbn= 0-12-097362-6|page=171 |pages= |chapter= 7}}</ref>。生产带有水印的纸张主要有两种方法，''压胶辊工艺''和''圆网印花工艺''。