Potassium Carbonate. (Potashes). Carbonate of Potash has been known since ancient times as a constituent of the ashes of land plants, from which it is obtained by extraction with water. In most cases Sodium Carbonate, which it strongly resembles, can be used in its place.
Potassium dichromate, [32].
Privet, [39], [41], [42], [121].
Purple, from lichens, [53], [57-60], [62]; with cochineal, [95], [96]; with logwood, [82], [85], [86], [87].
Purple Dye Plants, [43].
Q.—Quercitron, [116-120]; for green, [135-137].
R.—Red, [87-107]; from lichens, [48-51], [53], [56], [58], [60].
Red Dye Plants, [38].
Red Spirits. Tin spirits. Applied to tin mordants generally. A solution of Stannous chloride.