1, poor villus density, the general eye can be intuitive to tell, some of the color paste may seem more difficult, this time to rely on the hand, the density of good looks feel very plump and thick feeling, the density of poor looks touched The feeling that the fluff is easy to fall.

2, fluff height is not enough, this is relative to customer requirements. The customer requires a hair height of 1.0 MM, and many factories often have 0.8 mm hair height to replace it. Inexperienced people are often unable to tell, and you can use a magnifying glass to see this.

3, the most important is the villi's fastness, this identification is also relatively simple, nail straight hard to scrape well, not fast enough to immediately scrape off, no nails can consider coins or other hard spots.

4, other, such as: formaldehyde content, wet grinding, dry cleaning, washing, sun and other fastness, not the naked eye and feel can feel, need a professional body to test.