This section is from the book "The Professed Cook: Or, The Modern Art Of Cookery, Pastry, And Confectionary", by B. Clermont. Also available from Amazon: The professed cook.
For Red, take Beet-root baked and pounded, put a little Cullis to it, and sift it in a Stamine, taking care that it be pretty thick: You may make a little thin Paste of it, which cut to what form or slower you please, to be applied upon any thing you have a mind to flourish; basting the Meat first with Whites of Eggs to make the Colour stick, and then putting it into the oven a moment, just to dry it.
Yellow is made with Yolks of hard Eggs pounded, and a little Cullis, and fisted as the former.
Green is made with Spinach, scalded and pounded, and finished in the same manner; and the like may be done of any others.
Cochineal and Saffron also make very good Colours; and if you mix a little melted Ifinglass with each, it Will make the Jelly stronger, and fitter to cut into different shapes, with which you may garnish any cold Dishes, according to fancy.
 
Continue to: