SCIOPTICON MANUAL. 



79 



the number of colors available for painting on glass 

 necessarily limited. The most valuable for this purpose 

 are the moist water colors procurable in metallic collaps- 

 ible tubes : for yellow, Indian yellow, Italian pink, and 

 yellow lake ; for blue, Prussian blue and indigo ; for red, 

 madder lake, crimson lake, and scarlet lake ; for orange, 

 burnt sienna; for brown, madder brown, Vandyke brown, 

 sepia, and burnt umber; for black, India-ink and lamp- 

 black; for purple, purple lake, or red and blue mixed; 

 for green, mix yellow and blue; for scarlet, red and 

 yellow. A white porcelain palette, free from specks and 

 grit, is the best upon which to mix and arrange the 

 colors. Use soft water for mixing the tints. For cake 

 colors, use a weak gum water, taking care to have it 

 quite dilute to prevent the colors cracking or peeling 

 off; place each tint on a separate slab or saucer. 



A suitable easel for holding the glass to be painted, is 

 shown in the diagram (Fig. 25); this is a sloping frame, 

 holding a sheet of glass, so arranged that it can be placed 

 at any angle, and any convenient height for the artist. 



Fig. 25. 



The glass or photograph to be painted, should be placed 

 upon the clear glass in the frame (as shown at S). Upon 

 the base board (A) is spread a sheet of pure white paper 

 to reflect up the light through the painting ; the light 

 should fall on it from the left hand, and is best obtained 



