US22836A - Improvement in sizing for colored papers - Google Patents

Description

UNITED STATES PATENT OFFICE.

IMPROVEMENT IN S IZING FOR COLORED PAPERS.

Specification forming part of Letters Patent No. 22,836, dated February 1,1859.

To all whom it may concern:

Be it known that I, OHARLEs WILLIAMS, of the city of Philadelphia, in the State of Pennsylvania, have invented a new and improved composition of matter or water-proof sizing for marbled and other colored papers; and I do hereby declare that the following is a full and exact description of the same.

My invention has for its object the production of aqueous sizing for coating marbled and other colored papers, which, when duly applied, dried, and finished upon the said papers, substantially as hereinafter described, shall not only be water-proof under the pasting or wet-' ting to which the paper is necessarily subjected in using in book-binding, but also sufiiciently tough, pliable, and adherent to the paper to prevent its being cracked or sealed 011' in folding or doubling and undoubling the said paper when dry and finished; and it consists in the employment or use of a solution of the gum-resin lac (as shellac or seed-lac) in combination with a solution of either soap or beeswax, or both, dissolved substantially in the manner hereinafter described, in making a sizing for marbled and other colored papers.

To enable others skilled in the art to make and use my invention, I will proceed to describe it more minutely.

The ingredients and their proportions of my improved sizing as I usually make it are as follows, viz: shellac, five ounces; refined borax, one ounce; white soda-soap, one ounce; beeswax, one-half ounce; salt of tartar, (subcarbonate potash,) oneeighth ounce; common glue, two ounces; water sufficient to thin the whole properly.

In proceeding to incorporate the above specified ingredients together, I first scrape the soap.

into fine shavings, put them into asuitable vessel, and add enough water to dissolve them or produce a thin fluid with the aid of a moderate heat. I then add the borax and the shelish ed surfaces.

lac and boil all together until the shellac is dissolved,when I add the glue, (which has been previously soaked in water until softened to a jelley,) and stir the whole together until they have become thoroughly incorporated. I now add the beeswax, (which has been previously dissolved in a strong aqueous solution of the salt of tartar,) stirring all well together and adding gradually about two quarts of water, or a sufficiency of the latter to make the sizing of a proper thinness for use, which of course must be varied to suit the kinds of paper to be sized.

In applying the sizing I usually proceed as follows: Having transferred and cooled it in a suitable vessel, I dip the sheets of paper separately into the sizing, drain them by suspending upon rods of any kind, and let them dry, when they are passed between ca'lenderingrolls in the usual manner to produce the pol- The operation is now finished. The sizing being water-proof, and therefore durable under the operation of pasting, as in hook-binding, &c.,there is no liability to injure or to smear the colors on the paper should the finished surface of the same become wetted by the paste, as is the ease in all mar-bled papers finished with the sizing heretofore used.

Having thus fully described my invention or improved sizing, what I claim as new, and desire to secure by Letters Patent,,is-

The employment or use in a sizing for marbled and other colored papers, of asolution of the gumresin lac, in combination with a solution of either soap or beeswax, or both, the said solutions being made and incorporated together in the sizing, substantially in the manner and for the purposes described.

CHARLES WILLIAMS.

Witnesses WM. HINKLE, WILLIAMS OGLE.