Dictionarium polygraphicum. Of compounded colours for washing of maps.

Dictionarium Polygraphicum:
Or, The Whole Body of Arts Regularly Digested.
Vol II.
London: Printed for C. Hitch and C. Davis in Pater-noster Row, and S. Austen in St. Paul's Church Yard. MDCCXXXV.
A blue to wash upon paper.
Take half an ounce of the best azure, of kermes, one ounce; mix them and temper them with gum-water, and it will be a glorious blue.

A Venice blue.
Make quick-lime into a paste with strong vinegar, and half an hour after, put more vinegar to soften it, then add to it an ounce of indigo finely powdered; mix them together and digest them for a month or 6 weeks, in horse-dung.

Another excellent blue.
Mix fine chalk with juice of elder-berries, full ripe; and put to it a little alum-water.
Ultramarine, blue, bice, smalt and verditer, ground singly with gum-water, or together, make a good blue.

To make blue smalt.
Take fluxible sand, sal-nitre, and cobalt, and mix them together.

Green, digest filings of copper in distill'd vinegar, till the vinegar is blue; set it in the sun, or on a slow fire, till it is thick enough, and it will be a good green.

Or thus; take cedar-green, which is the best of all, or instead of that, green bice, steep it in vinegar and strain it, then grind it well with fair water, and add to it a little honey, and dry it well, and when you use it, mix it with gum-water.

A light green; grind together juice of rue, verdegrease, and saffron, and use them with gum-water.

Or thus; steep sap-green, flower-de-luce, or tawney-green, in water; also verditer and ceruse, mixt with a little copper-green, make a good light colour.

A never-fading green.
Put the juice of flower-de-luce into gum-water, and dry it in the sun.

To make a lively yellow dissolve orpiment in gum-water, put to it a little ground vermilion; grind them together, and they will be a very lively colour.

Orange-colour; red-lead and yellow-berries make a good orange-colour: or thus; boil an ounce of arnotto, and a drams of pot-ashes, in a quart of water, till half is boiled away; then strain it and use it hot.
This is good for paper, parchment, vellum, white leather, quills, &e.

Mix white Indian-lake, and red-lead, (according as you would have it, light or deep) and to distinguish a man's flesh from a woman's, mingle a little oker with it.

Ceruse, red-lead and English-oker, and path, make a good brown.

This not being calcin'd, is a dirty colour; but yet is proper for a horse, dog, &e. but to shadow vermilion, or to lay upon any dark ground, behind a picture, or to shade berries in the darkest places, or to colour wooden posts, wainscot, trees, &c. (being burnt) is very good.

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