GREENING.

This comes from the use of too many clear rubbing or finishing coats of varnish to a black surface. Successive coats of clear rubbing varnish, capped with a heavy coat of finishing, applied over a black japan ground, affords a pronounced and, in some respects, enticing shade of green. Greening of a varnish surface is also effected by confining the freshly varnished work in a dark apartment while the drying is going on. When the work is fit to remove from the varnish drying room, in order to intensify the greening, it may be stored in a dark room or repository for a time. Recently varnished surfaces held for a few weeks in dark apartments green rapidly. Prevention: Use black color-and-varnish over black color grounds. Add a dash of black color to each of the clear rubbing coats up to and including the final rubbing. Furnish the drying room with plenty of light on all sides, and, so far as possible, insist vigorously upon the necessity of light, airy carriage houses and repositories.