How to distinguish the quality of water-based glue?

A few simple ways to distinguish the quality of water-based glue:

① Pour the glue on the flat glass to observe its rheology, swing it left and right to observe its rheology.

Conclusion: The flow of glue is too fast, indicating that the glue is too thin. Poor fluidity, too thick is not conducive to bonding.

②Dip it with your hand to observe its viscosity.

Conclusion: It is better to be able to draw silk slowly, and a little sticky hand is better.

③ Pour it on a small piece of glass and observe its film-forming time.

Conclusion: In about 1 to 2 minutes, the film forming time of the glue that can form a film on the glue surface is better.

④ After the glue is basically solidified after the film is formed, use your fingers to saturate it and observe its cohesion.

Conclusion: The glue melts quickly-poor cohesion. The glue was turbid after purging-too much filler was added.

⑤ Stagger the two quick plates and glue them together, and measure the tension after 24 hours. Soak in the blisters for a day and then dry them to observe the color change.

Conclusion: If the tensile force of the glue changes very little, it indicates that the water resistance of the glue is very good. On the contrary, it is very bad.

In the above "distinguish water-based glue" test, if the glue is touched by hand, clean it with water before the glue is dry.