Home › Cements › Inks (Oz Mix together and color)

Inks (Oz Mix together and color)

1 oz. Mix together and color with red-lead, Veni- | to be placed in a situation free from dust, and tian-red or lampblack. 2. Resin, 19 oz.; beeswax, 1 oz.; color as before.

India-rubber Court-Plaster.

A stout frame of wood must be made, about 3 yards long and about 14 yards wide. Within this frame must be placed 2 sides of another frame, running longitudinally and across, so fixed in the outer frame that the 2 pieces may slide independently of each other backwards and forwards about 6 inches. Tapes of canvas must be tacked round the inside of the inner frame, so as to form a square for the material to be sewn in, which, when done, the two loop-frames must be drawn tightly to the outer by means of a twine passed round each, in order to stretch perfectly free from irregularities the silk or satin previous to laying on the composition.

To make the Plaster.

Dissolve India-rubber in naphtha or naphtha and turpentine; lay it on with a flat brush on the opposite side to that which is intended for the plaster. When the silk is perfectly dry, and the smell in a great measure dissipated, it will be ready for the adhesive material; to make which take equal parts of Salisbury or fine Russian glue and the best isinglass, dissolve in a sufficient quantity of water over a water-bath, and lay on with a flat hogtool while warm. It is requisite to use great caution to spread the plaster evenly and in one direction, and a sufficient number of coatings must be given to form a smooth surface, through which the texture of the fabric is not perceptible.

Each coating should be perfectly dry before the succeeding one is given; after which the frame is where a draught of air would facilitate the drying. The quantity of water used and the weight of the two materials must be a little varied, according to the season and the gelatine strength they possess. Lastly, the plaster being ready to receive the polishing coat, which gives also the balsamic effect to it, a preparation is made in nearly the same manner as the compound tincture of benzoin, with the addition of more gums. This preparation must be laid on once only, and with a brush kept for the purpose. For making plasters on colored silk it is only necessary to se lect the silk a shade deeper than the colors required, as the plaster causes it to appear a little lighter.

Tooth Cements Are only recommended when the decay has proceeded so far that the ordinary plugging is impossible. Those containing mercury are objected to by many. They consist of an amalgam of silver, gold, or tin, applied warm. The following have been used: 1. Anhydrous phosphoric acid, 12 grs.; pure caustic lime, 13 grs.; both finely powdered, and mixed rapidly in a mortar at the time of using.

Smoothe off with the finger moistened with a drop of water. 2. Asbestos, or levigated quartz, made into a paste with mastic varnish.

Artificial Ivory for Photographers.

Tablets of gelatine or glue are immersed in a solution of alumina. When entirely penetrated by the alumina, the slabs are to be removed, dried, and polished like ivory.

INKS, etc.