Why do shirt buttons crack or break as often as they do?

Buttons may crack during the pressing process, even though the padding of the pressing machine being in excellent condition.  The majority of buttons are made from a  polyester resin.  The strength of each button depends on the amount of polyester in the resin.  Some manufacturers use off-quality buttons to save money and the result is  a higher number of broken buttons.  We try our best to inspect garments for broken buttons to be replaced.