Test shall be mode at the specified temperatures using the test specimens prepared under the standard molding conditions. The test specimens shall be cut from a plate of specified thickness to be 80mmⅹ80mm. Do not cut from the gate area of the plate. When testing at low temperature, test specimens shall be left in the specified temperature for 3 hours or more prior to the test. An presser whose radius is 6.35±0.03mm and a receiver shall be mounted with a test specimen between them and a weight of a suitable mass shall be dropped from a specified height to check for generation of cracks. Determine the highest point in the heights at each of which five test specimens show no cracks by impact. Impact strength J (kgf•cm) shall be calculated from the mass of the weight and the height from which thd weight was dropped. An example of test apparatus is shown in Fig.4.