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Painting and Staining Glass, Etc
parts may not be impaired by the lead with which the pieces are to be joined together. The distribution being made, mark all the glasses, as well as papers, that they may be known again; which done, apply every part of the design upon the glass intended for it; and copy or transfer the design upon this glass with the black color diluted in gum-water, by tracing and following all the lines and strokes that appear through the glass, with the point of a pencil.
When these strokes are well dried, which will be in about 2 days (the work being only in black and white), give it a slight wash over with urine, gum-arabic, and a little black; and repeat this several times, according as the shades are desired to be heightened, with this precaution, never to apply a new wash till the former is sufficiently dried. This done, the lights and risings are given by rubbing off the color in the respective places with a wooden point, or by the handle of the pencil.
The colors are used with gum-water, the same as in painting in miniature, taking care to apply them lightly, for fear of effacing the outlines of the design; or even, for the greater security, to apply them on the other side; especially yellow, which is very pernicious to the other colors, by blending therewith. And here too, as in pieces of black and white, particular regard must always be had not to lay color on color, till such time as the former is well dried.
When the painting of all the pieces is finished, they are carried to the furnace to anneal, or to bake the colors. 40" of that and Dutch pink. This green may be lightened by an addition of Dutch pink.
When any of these are too strong, they may be lightened, by mixing white with them_upon the pallet; or darken them as much as required by mixing them with a deeper shade of the same color.
The colors must not be laid on too thick; but if troublesome, thin them before using them, with a little turpentine oil.
Take care to have a pencil for each color, and never use that which has been used for green, with any other color without first washing it well with turpentine-oil, as that color is apt to appear predominant when the colors are dry. Wash all the pencils, after using, in turpentineoil. The glass, when painted, must stand 3 or 4 days free from dust before it is framed.
To Draw on Glass.
Grind lampblack with gum-water and some common salt. With a pen or hair-pencil, draw the design on the glass, and afterwards shade and paint it with any of the following compositions:
Color for Grounds on Glass.
Take iron-filings and Dutch yellow beads, equal parts. If a little red cast is wanted, add a little copper filings. With a steel muller grind these together on a thick and strong copper plate, or on porphyry. Then add a little gum Arabic, borax, common salt, and clear water. Mix these with a little fluid, and put the composition in a phial for use.
Colors Proper to Paint with Upon Glass.
The several sorts of colors, ground in oil for this purpose, may be had at all the color-shops, etc.
Whites. Flake white, podium.
Blacks. Lampblack, ivory-black.
When it is to be used there is nothing to do but, with a hair pencil, to lay it quite flat on the design drawn the day before; and having left this to dry also for another day, with the quill of a turkey, the nib unsplit, heighten the lights in the same manner as with crayons on blue paper. Whenever