Rubber compounding ingredients — Carbon black — Determination of tinting strength
ISO 5435:2017 specifies a method for the determination of the tinting strength of carbon black relative to an industry tint reference black.
The method is based on the use of five different commercial instruments. Other instruments can be used if the test results for the standard reference blacks are within the control limits given in ASTM D4821.
NOTE The Densichron reflectometer and the Meeco Colormaster are no longer commercially available, but the procedures have been included for the benefit of those who still use these instruments.
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