English to French Tech/Engineering Materials (Plastics, Ceramics, etc.) Test Method

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8.1.5 A light trap shall be provided that will completely absorb the beam when no specimen is present, or the instru- ment design shall obviate the need for a light trap.
8.1.6 A schematic drawing of a spectrophotometer with unidirectional illumination and diffuse viewing is shown in Fig. 2.

NOTE 8—It is strongly recommended that conformance to the intent of this test method be confirmed through use of properly calibrated haze standards due to the difficulty of confirming conformance to this test method when using a drill spectrophotometer.