Different features: seal characters or images have concave and convex forms. The concave is generally called yin, and the convex is generally called yang. In the traditional "positive printing", the characters printed on the paper (plane) are blank (considered as "negative printing"); However, the traditional "Wen Yin Yin Yin Yin" printed on paper is vermilion (red) (considered as "Yang Wen").

Weighing the differences, in terms of printing color, the ink color is light, the white print is heavy, and the ink color is elegant, which is suitable for covering the ink and keeping the harmony between the two. Works with strong ink color are suitable for white carving, so that red ink color and black ink color form a strong contrast and set each other off.

Measures to be taken to replace and stop using seals:

Collect the original seal and the seal adjustment to the comprehensive office of the company for safekeeping.

Immediately notify relevant stakeholders, including owners, supervisors, subcontractors, suppliers of materials and equipment, etc. About the invalidation of the original seal, the new seal is activated.

The seal has been out of use for several years. If it needs to be destroyed, the seal management department shall make a destruction report, record the name of the seal, the destroyer, witnesses, sales time and seal samples, and file them.