The watermark formed in the process of papermaking is "sandwiched" in the paper rather than on the surface of the paper. People, figures or characters with light and dark textures can be clearly seen under the illumination of light. It is made by changing the density of pulp fiber in the process of paper production. Usually RMB, shopping coupons, food stamps, securities coupons, etc. Are used in this way to prevent counterfeiting or as a trademark.

Using Photoshop software can also imitate the watermark effect, the specific production method is:

1, open ps software, open a picture and copy the layer;

2. Click the "T" text tool on the left toolbar and type;

3.ctrt+t adjusts the size and position to rasterize the text;

3. Hold down the ctrl key and click the icon to load the selection area, and then select-deselect. Ctrl+j imitates the font layer;

4. Close the "Text Layer", select "Layer 1", double-click to bring up the "Layer Style", and set the effects of "Bevel and Relief" and "Projection" to finish.