First, pour the glue on the flat glass to observe its rheology, and wiggle it to observe its rheology,If the flow of glue is too fast, it means that the glue is too thin and poor, and too thick is not conducive to bonding.

Secondly, with a hand dip to observe its viscosity if you can slowly draw, a little sticky hand is better.

Then, pour it on a small piece of glass to observe its film forming time if it is about 1 to 2 minutes, the film forming time of the glue can form a film on the glue surface is better.

The fourth step, the glue after the film is basically solidified with fingers dipped in water to diarrhea, observe its cohesion if the glue is quickly changed to open cohesion is poor after diarrhea glue is turbidified - with filler

Finally, stagger the two boards and glue them together. After 24 hours, measure the tension. Soak them for a day and then dry them in the sun to observe the color change

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