Trade Wrinkles.

Working on Glazed Paper.—Correspondents of the Inland Printer complain that they cannot prevent ink from rubbing off highly-glazed paper, such as is used by boxmakers. The editor says the difficulty has never been satisfactorily overcome—driers make the ink sticky, and « pull, » and other mixtures deaden the color, and rub off when worked. The fault is caused by the paper having been burnt by the glazing-rollers. A good soft quick-drying ink should be used, and the paper placed near a stove to heat it while working.

Bronze in Lithography.—A correspondent of the American Lithographer and Printer writes:— « We have to print labels on steel-blue paper, but find if we print so as to make the bronze hold, the paper will peel off, and if we add tallow in the ink the bronze will not hold—what can be done about it? » The editor answers:— « We have seen printers, who could not regulate the holding of the bronze and the peeling off of the paper, resort to mixing tallow in the ink with stiff varnish, thinking this would help. They calculated that the stiff varnish would hold the bronze, and the tallow make the ink soft enough to prevent the paper from peeling off; but they failed, as tallow has the quality of keeping the ink fresh for all time, so that the bronze can be wiped off, and will never dry properly. We will tell how to overcome this difficulty as well as possible. The first thing, of course, is always to keep stiff varnish in the color, and no thin varnish whatever. Now mix as much as necessary of lavender oil in the ink. This softens the ink and prevents the peeling off; but use no more of it than absolutely necessary. Begin with a trifle and add more and more until you see that the paper does not peel off any more. Lavender oil is better than tallow, as it softens the ink more, but evaporates and does not remain in the ink of the imprestion, and therefore the ink will dry as quickly as without it. But here comes another question: If the work on the stone is very fine and close, too much lavender oil would spread out the fine lines and make the work look smutty and indistinct. It there is fine work only on the stone, the paper would not peel off so easily, and it could be printed without lavender oil. A slow speed on the steam press would make this go; but very often there are solids and fine work together on the stone. In this case we have to use the following new remedy: Take two parts of No. 2 varnish, two parts of Venetian turpentine, and one part of yellow bees-wax; melt these well together and mix them in the ink, which will answer for all purposes. This, preserved in a covered tin box, will keep good for many years, and will never get a skin on top nor lose anything of its good qualities. »