Ink for printing in the 17th-18th c. and even today would be a combination of lamp black/soot ( carbon) and an oil, like linseed. Ink for writing in the 17th-18th c. would typically be made from mixing iron ( finely ground, or filings, or perhaps a handful of old nails) and vegetable tanin from something like nut galls or oak bark. These would combine to form iron tannate, and to that some gum arabic was often added to keep the solids from settling to the bottom of the bottle and make the ink flow and stick well to the paper. This would be a pretty dense black, initially, but would then fade to a sepia over many years.

There were quite a few old recipes for inks, however: that basic "gall" ink might have been augmented with some lampblack or some "copperas" or copper sulphate. Some fomulations and history can be found here in David Carvalho's Forty Centuries of Ink

One he lists from 1602 is in rhyme, unusually doesn't have any iron in it..perhaps it's to be cooked in an iron pot?

To make common Ink, of Wine take a quart,

 Two ounces of Gumme, let that be a part;

 Five ounces of Galls, of Cop'res take three,

 Long standing doth make it the better to be;

 If Wine ye do want, raine water is best,

 And then as much stuffe as above at the least,

 If the Ink be too thick, put Vinegar in,

 For water doth make the colour more dimme.