1. The glue for pasting pictures is generally shadowless glue and E6000, but it is recommended that you use shadowless glue. E6000 is the king of bubbles, which is easy to produce bubbles.

2. Generally, the adhesives used for sticking the bottom bracket are E6000, ANTEGU, 502 and small white cap. If you stick a picture with shadowless glue, you'd better not use 502 as the glue base, which may make the picture discolor. Antegu is a dry adhesive, and E6000 is a slow-drying adhesive. Because I have a quick temper, I use Antegu, but I advise beginners not to use Antegu. If it dries too fast, the patch will stick as soon as it is stuck, especially on both sides, the picture is not aligned, and the hand is often stuck. E6000 is recommended.

Here are some kinds of glues.

Shadow-less glue: ultraviolet glue, generally used for pasting pictures. Dry in the sun for about a minute. There are ultraviolet rays on cloudy days, but it dries slowly on cloudy days and may not stick. If it is cloudy or at night, you can use a small ultraviolet lamp or phototherapy machine. Small ultraviolet lamps are cheaper, but they take a long time to dry. The phototherapy lamp is a bit expensive, but it can irradiate many gems together and dry quickly.

E6000: slow-drying adhesive, which can be used for sticking pictures and backing. However, it is easy to produce bubbles when pasting pictures, and it is generally used to paste the bottom support. It can be placed anywhere without ultraviolet rays.

Antegu: Quick-drying adhesive, which can be dried within 5 seconds generally, has high viscosity and is generally used for sticking base.

502: High viscosity quick-drying adhesive. It is generally used to stick the bottom plate, and it is not recommended to use it to stick the bottom plate. If the picture is adhesive without shadow, the substrate with 502 is likely to change color.

Small white hat: quick-drying adhesive, high viscosity, similar to 502, generally used to stick the base. It never seems to change color.

UFO: Quick-drying adhesive, high viscosity, soft after drying, non-toxic and environmentally friendly, generally used for sticking substrates.

UHU: Quick-drying adhesive, with high viscosity and good water resistance, is generally used for sticking the base.

Detailed operation of shadowless glue:

Drop a drop of shadowless glue on the screen, and the size of the screen determines how much to drop. Then cover the glass. If there are bubbles, press your finger on the glass for a while and the bubbles will leave you. If it really doesn't work, drop a little more shadowless glue. The quality of photographic paper determines the number of bubbles. If it is not a good photographic paper, it is easy to produce many bubbles. In this case, apply more shadowless glue. When there are bubbles on the glass plate, press the glass plate hard. Some bubbles will run away from the side, but most will not. Then remove the glass sheet and press it on. Press the glass plate after bubbles appear. After repeated several times, there will be no bubbles at all. In the process, pay attention. Remember to drop a drop of shadowless glue on the screen after repeating this action twice, because there will be less glue on the screen.

Source: Time Top Gem Post Bar Novice Textbook