How to define the quality of the eyelash extension glue?

The glue is quick-drying. Usually, it takes 1 to 2 seconds, and the curing time is 40 to 60 days. We call it S+ glue. And there are 2 to 3 seconds and 3 to 4 seconds. The faster it dries, the better the glue, the longer it lasts, and the greater the smell.