(Correspondence) [474] Marking-Ink for Bales.

Manufacturer and builder 10, 1872

1 lb. of chromate of potash is enough for 100 lbs. extract of logwood; leave the copperas out, and substitute a few ounces of the solution of indigo in sulphuric acid, also use less water and more lampblack, and we are confident that your ink will be more concentrated.

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