Edge break from pressure III (primary breach)

Mechanic spot load – short-term or long – small/medium intensity

Type of glass	Polished glass, rolled sheet glass, laminated glass, ornamental glass.
Examples	Primary breach having placed on the stone or metal Primary breach, the wrong installment of the glass belt; Small stones or metal between the glass edge and the supporting wooden brick.
Beginning	Edge crack angle in all directions, not upright; Transition angle is not upright; Edge curvilinear cracks are of different sizes in the beginning; Clear centre in the edge.
Lines of process	Beam forms from edges; From direct to angular break lines; Often do not last till the edge; In the middle there are no cracks.
End	Direct lines; In the middle of the glass or last to the glass edge.
Other features	Small or large curvilinear cracks in the beginning of fragmentation.

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