This Part of BS 6092 describes a method of test for determining the matter insoluble in water for sodium and potassium silicates for industrial use. It is particularly applicable to sodium metasilicate pentahydrate, but may be used for other silicates that are easily soluble in water.
There is no international standard corresponding to this Part of BS 6092.
NOTE. BS 6092 : Part 6 specifies a method for the determination of matter insoluble in water for sodium and potassium silicates that are not easily soluble in boiling water.