1, weighing method
Weighing method is that you put the cardboard box you buy on the electronic scale weighing, see the cardboard box in the end how much, generally weighing 10, take its average.
Example:, the same price, pay attention to the same price! A 12-gauge carton, A manufacturers 32g, B manufacturers 35g, then there is no doubt that B manufacturers of cartons of good quality, more cost-effective. Weighing method do not care about corrugated, carton is priced by grams, grams of higher quality the better.
2, two pressure method
The so-called pressure method is to pinch the carton with two fingers to see which one is more resistant to pressure. This method is very simple, no more. But not accurate, can not really distinguish between good and bad cartons. Because the cardboard box is very easy to moisture, moisture is originally very good quality cardboard box is also very soft.
3, calculation method
12 carton, 130 * 80 * 90, calculated the unfolding area of 0.1 square. Three layers of the best is three layers of C corrugated 170, meaning that each layer is 170g, that is, we said the super hard, generally rarely used, not cost-effective. The weight of each square in 170 + 170 * 1.5 (C corrugated compression ratio is 1.5) + 170 = 595g about 600g. then 12 carton is about 0.1 * 600g = 60g or so. If someone gives you a three-layer 170 with a 40g carton, then he is a liar.