CARBON BLACK

摘要

A CARBON BLACK HAVING A RATIO OF A MAXIMUM ABSORBANCE IN A RANGE OF 1800 TO 1670 CM-1 TO A MAXIMUM ABSORBANCE IN A RANGE OF 1670 TO 1500 CM-1 OF NOT LESS THAN 0.65 ON CONDITION THAT A STRAIGHT LINE INTERCONNECTING THE ABSORBANCES AT 1805 CM-1 AND 900 CM-1 IS TAKEN AS A BASE LINE IN AN ABSORBANCE CHART OF INFRARED ABSORPTION SPECTRUM.