How to verify the authenticity of 20 19 24 solar terms stamp souvenir sheet

Simple identification method: 1. Generally, low-value stamps will not be faked, and counterfeiting will cost money. Most stamps, especially those from the 1990s, are worthless, so counterfeiting is not cost-effective.

2. Bring your own magnifying glass, preferably 40 times. Under the magnifying glass, the truth is clear at a glance. True ink is well-proportioned and full, with clear outline. The false one is obviously grid-like and has a vague outline. Most imitations can be identified like this. 3, with purple light, fluorescence. Some stamps (such as small stamps) can see the code under purple light, and some stamps (such as old promissory notes) have no fluorescence reaction under purple light. Of course, this requires a certain knowledge of stamps. As for professional tools such as calipers, they are all advanced and can be used as backup. Personally, I think it is not necessary. 5. Particularly valuable stamps, such as monkey tickets. You'd better find an expert to identify it. If you really want to rely on yourself, you should find more posts online. Generally, counterfeit stamps with higher value have special articles, which can be compared. Combined with the tools and methods introduced above, it is close. For reference only, I hope it helps.