Manufacturer and Builder 4, 1893
Is there any permanent ink that can be relied upon to last indefinitely when used on paper?
— J. McC., Toledo, O.
Answer. The so-called carbon inks, and the India ink used by draughtsmen, are practically permanent. That is to say, they will not fade or become obliterated by age, or by the action of dampness, or chemicals. The trouble is not to get an indelible ink, but a permanent recipient on which to use it. Paper, even the best, is a poor dependence, for even five hundred years; and even parchment will not last indefinitely, except under exceptionally favorable conditions, like those existing in the rock and masonry tombs of Egypt.
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