Common lyperies for identifying the quality of glue:
★Pour the glue over the flat glass to observe its flow, swinging left and right to observe its flow.
Conclusion: The flow of glue is too fast, which indicates that the glue is too thin. Poor liquidity, too thick is not conducive to bonding.
★Watch its viscosity with a touch of your hand.
Conclusion: Can slowly pull the wire, there is a little sticky hand for better.
★Pour over a small piece of glass to observe its film time.
Conclusion: In 1 to 2 minutes or so, the glue forming film on the surface of the glue is better.
★The glue after the film is basically cured and then sprayed with water with its fingers to observe its cohesion.
Conclusion: The glue is quickly turned open -- the cohesion is poor. The glue is cloudy after the spillaway - with a filler.
★Bond edited together after two fast plates are staggered and the pull is measured after 24 hours. Dry in the blisters for a day and observe the color changes.
Conclusion: If the pull change of glue is very small, it shows that the water resistance of the glue is very good. The opposite is bad.