1, which is used for exhibition boards. Generally, it is a photo of a double-layer acrylic clip. You can directly clip the picture and fix the four corners firmly with mirror nails.
2, can be made into UV spray paint, front spray, back spray can also be used outdoors for 3-5 years. This kind of equipment can be found directly.
3. There is also a press fit, similar to 1, where the picture is sandwiched between two layers of acrylic, but it is stuck together and the picture cannot be changed. Usually, this kind of sign is marked with small size, house number, table card, badge and so on.
There are other styles. If you want to know the specific production method of each item, you can search for the logo of Zhang Bing or Hongyuan to make a more detailed understanding for you.