Anthracite coal is always put through several washes before reaching the consumer. The Glen Alden Coal Co. of Buffalo and Rochester, N. Y., has made the last wash a blueing process. The idea: to make coal attractive, to give it advertising appeal under the trade name of "Blue Diamond." The dyeing process costs only three or four cents a ton, does not impair the heating power of coal.
Despatches from Pottsville, Pa., indicate that another anthracite company is experimenting with a dye to make its coal pink.
...
To continue reading:
or
Log-In
