Lastly, aluminate of soda may be used as a mordant in place of red liquor or sulphate of alumina.
It is possible to produce a mixed solution of aluminate and silicate of potash which will remain liquid for twenty-four hours.
The result is the formation of a solution of aluminate of soda, and insoluble fluoride of calcium (lime).
aluminate of soda prepared as above occurs as a white powder, of a greenish-yellow hue, and dry to the touch.
aluminate of soda may likewise be procured from cryolite, as described under Alum.