Homemade liquid paste

Mix Spanish white, or tobacco-pipe clay, or any other argillaceous matter with water, and leave it at rest some hours, which will be sufficient to separate the argillaceous parts, and to produce a sediment. Stir the sediment with a broom, to complete the division of the earth; and after it has rested some seconds, decant the turbid water into an earthen or wooden vessel. By this process the earth will be separated from the sand and other foreign bodies, which are precipitated and which must be thrown away. If the earth has been washed by the same process on a large scale, it is divided by kneading it. The supernatant water is thrown aside and the sediment placed in sieves, on pieces of cloth, where it is suffered to drain; it is then mixed up with oil rendered drying by a large dose of litharge, that is about a fourth of the weight of the oil. The consistence of thin paste being given to the mixture, it is spread over the cloth by means of an iron spatula, the length of which is equal to that of the breadth of the cloth. This spatula performs the part of a knife, and pushes forward the excess of matter above the quantity sufficient to cover the cloth. When the first stratum is dry, a second is applied. The inequalities produced by the coarseness of the cloth, or by an unequal extension of the paste are smoothed down with pumice-stone. The pumice-stone is reduced to powder and rubbed over the cloth with a piece of soft serge or cork dipped in water. The cloth must then be well washed in water to clean it; and after it is dried, a varnish of gum-lac dissolved in linseedoil boiled with turpentine, is to be applied to it.

This preparation produces yellowish varnished cloth. When wanted black, mix lampblack with the Spanish white or tobacco-pipe clay, which forms the basis of the liquid paste. Various shades of gray may be obtained, according to the quantity of lampblack which is added. Umber, Cologne-earth, and different ochry argillaceous earths, may be used to vary the tints, without causing any addition to the expense.

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