hard water only produces a lather with soap when that soap has effected the softening of the water, and not till then.
hard water is water in which some kind of salt has been dissolved.
hard water Streams which flow over limestone dissolve some of the stone, and the water becomes "hard."
Most of the water thus obtained is hard water, from its limestone qualities, but it is most unquestionably healthy.
Soft water suits indigo dyeing better than hard water, and is to be preferred.
The water used for this solution should be as soft as possible, as hard water is liable to produce opaque streaks of lime soap.
Do not bathe in hard water; soften it with a few drops of ammonia, or a little borax.
The hard water, that comes through limestone rocks, adds lime in solution to the ocean water.
Red flannel preserves the color best, and is softest, washed in hard water.
But in hard water soap seems to curdle, and some softening agent like borax has to be added or the water will chap the hands.