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Splay marking This fault，which appears on a great many mouldings，shows an area, generally near the…

Splash marks，mica marks，silvering This fairly common fault is easily recognized by the streaky，silver appearance of…

Short mouldings The causes of short mouldings are many and varied and are sometimes difficult…

Flow marks Material entering a mould always follows an almost identical path with successive mouldings.…

Flash The escape of a thin web of material at parting lines,around ejector pins or…