No. 6 Blue Stormont
Is an old pattern, but well worthy of being revived. Though apparently very simple and easy of execution, it is nevertheless very difficult to keep in order, in consequence of the speedy evaporation and the chemical changes which are continually taking place among the ingredients with which it is mixed. It requires great quickness and acute observation on the part of the workman.
There is but one vein-colour, (red,) and the ground or body-colour is blue. The same preparation of gum and flea-seed is used for this as for the French marble. Mix the red for vein, as usual, with gall and water. The other colour must consist of good indigo alone, without which the proper effect cannot be produced. The indigo being ground, as before directed in the instructions for grinding the colours, proceed to mix the indigo with gall, water, and spirits of turpentine,—of which last ingredient it will require a considerable proportion, in order to make it break full of little holes. The acme of this pattern is to make it look like fine network. Sometimes it will happen that at first mixing it will not work, but after standing a day or two it will work well, while at other times it will work immediately. If the holes come too large from an excess of turpentine, (for they will sometimes come too large from not having enough,) add a little more gall and some fresh indigo, putting in a few drops of alum-water; but be very careful of this; for, if there be too much, it will make the colour thick and clotted: in which case have recourse to a little of the solution of potash; but it is best, if possible, to do without either of them.