I.S. EN ISO 489:1999现行

Defines two test methods for determining the refractive index of plastics, namely: Method A: a refractometric method for measuring the refractive index of moulded parts, cast or extruded sheet or film, by means of a refractometer; Method B: an immersion method (making use of the Becke line phenomenon) for determining the refractive index of powdered or granulated transparent materials by means of a microscope.

BS EN ISO 489:1999 - Identical

SN EN ISO 489:1999 - Identical

NEN EN ISO 489:1999 - Identical

ISO 489:1999 - Identical

SS EN ISO 489 Ed. 1 (1999) - Identical

UNE EN ISO 489:2000 - Identical

NS EN ISO 489 Ed. 1 (1999) - Identical

UNI EN ISO 489:2001 - Identical

NF EN ISO 489:1999 - Identical

NBN EN ISO 489 Ed. 1 (1999) - Identical

ONORM EN ISO 489:1999 - Identical

DIN EN ISO 489 (1999-08) - Identical