Dictionarium polygraphicum. To write with Gold and Silver.

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.
1735
Grind gum-armoniac with a little juice of garlick, and put to it a few drops of weak water of gum-Arabic, and so make it to the thickness of an ink, that you may conveniently write with it; then let it dry a little, but not too much, lest it should not take the leaf-gold or silver; nor too little, lest it drown them. Then lay the leaf-gold or silver upon a gilding cushion; take it up with a piece of cotton, on which you have breath'd, and cover with it the part you intended, pressing it down hard; and where the gum-water is, it will take. Then brush off with a bit of other cotton, what it has not taken; and when it is thoroughly dry, burnish it with a piece of polish'd ivory, and it will appear very bright.

Another way.
Take shell-gold, which is made of the rug ged edges or cuttings of leaf-gold; and when you are going to use it, put in a little fair water, and temper it up with a clean pencil, and lay it on either with pen or pencil, in what form you please, either by way of writing or gilding, and let it be thoroughly dry; rub it over with a dog's, calf's, or horse's foretooth, and it will be very shining and lustrous.