Brazil dust, half a pound; alum, two ounces, well powdered; boiled in a pint of vinegar and a pint of water till brought down to a pint. Strain and bottle. The red edges now in vogue are made with vermilion, mixed with vellum-size. The better class are scraped before they are coloured, and afterwards they are burnished.
PURPLE.
Logwood chips, in the proportion of half a pound to two ounces of alum, and a small piece of copperas, boiled in three pints of soft water till reduced a third, will make a good purple.
Brazil dust, submitted to the action of strong potash water, will make a good purple for immediate use, but will not keep.
BROWN.
A quarter of a pound of logwood, and the same quantity of French berries, boiled together. If a darker shade is required, add a little copperas. Plain brown edges are made with burnt umber, in the same manner as that described for red edges.
With these colours, edges of books may be sprinkled to almost an infinite number of patterns. A few will be given; for, though fancy sprinkles are seldom used where the binder can get the edges of extra books marbled, they will be of use to those who would find marbling a work of too great preparation and expense for a small number of books in places where there is no marbler.
RICE MARBLE.
This pattern has been so called from the use of rice; but linseed, or bread crumbs, will answer the same purpose. The rice is laid on the edge of the book according to fancy, and the edge sprinkled with any colour, the rice thus forming blank spaces. The edge may be coloured previously all over, or sprinkled with a lighter shade.
WHITE SPOT.