This part of ISO 294 specifies two two cavity moulds, the type D1 and D2 ISO moulds, for the injection moulding of small plates measuring 60 mm ,) 60 mm with a preferred thickness of 1 mm (type D1) or 2 mm (type D2), which can be used for a variety of tests. The moulds may additionally be fitted with inserts for studying the effects of weld lines on the mechanical properties (see Annex A).