The type of buttons

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Hollow button, snap button, bag pearl button
Binding requirements: must use special mold binding and binding equipment, binding between thick cloth binding 0.3~1.5mm, after riveting firmly, buckle surface deformation, a latch should meet the standard requirements
 

 
3, the international standard
The new international environmental standards, the European Chemicals Agency (ECHA) original standard:
1, lead Pb less than 1000ppm 2, Cd CD is less than 1000ppm 3, mercury Hg less than 1000ppm 4, six chromium Cr6 less than 1000ppm three, button 3, quality standard the measured data
1, Pb = lead 100ppm 2, Cd = CD 100ppm 3, Hg = mercury 100ppm
4, Cr6 = CR 100ppm
Note: if the lead content of less than 50ppm, while the price electroplating double. Usually the market said lead-free, refers to the lead content of less than 100PPM products, there is no absolute lead-free products
The models are generally 111# (7MM), 222# (9MM), 333# (10MM), 444# (12MM), 555# (14MM), and 888# (21MM). There are factories 777# (17MM) and 999# (24MM) button binding points
In 1, with the requirements of mould making, with the outer circle and inner hole should be moderate, convenient assembly and disassembly, otherwise will cause deformation caused by the stress of fastener geometry after binding, and cause the opening is not suitable for tightness caused by falling off, and even clothing will pull bad phenomenon.   
2, according to the geometric shape of the fastener processing of the corresponding shape of concave and convex mold, so as to avoid the shape of the fastener, deformation and destruction and cause loose, fall off and influence appearance and so on.  
3, the fabric thickness should be uniform, are prone to quality problems when binding is too thin too thick. Especially not sewn online. Because the fabric in the sewing stitch density, hardness, thickness increases, the binding is easy to deformation fastener.
4, reasonable and correct selection of fasteners, according to the characteristics of different fabrics, reasonable choice of fastener types, can reduce or avoid the binding / use of quality problems