1570. Meantime cut and trim your designs carefully to fit the glass (if it is one entire transparent sheet you will find it little trouble); then lay them on a piece of paper, face downwards, and damp the back of them with a sponge, applied several times, to equalize the moisture.
1571. After this operation, arrange your time so that your designs may now be finally left to dry for fifteen minutes before application to the glass, the varnish on which has now become tacky or sticky, and in a proper state to receive them.
1572. Apply the printed side next to the glass without pressure; endeavor to let your sheet fall perfectly level and smooth on your glass so that you may avoid leaving creases, which would be fatal.
1573. Take now your palette, lay it flat on the design, and press out all the air bubbles, commencing in the centre, and working them out from the sides; an ivory stick will be found useful in removing creases; you now leave this to dry, and after twenty-four hours apply a slight coat of the liqueur diaphane, leaving it another day, when if dry, apply a second coat of the same kind, which must be left several days: finally, apply a coat of varnish over all.
1574. If these directions are carefully followed, your glass will never be affected by time or by any variations in the weather: it will defy hail, rain, frost and dust, and can be washed the same as any ordinary stained glass, to which, in some respects, it is even superior.