Читать книгу Henley's Formulas, Recipes and Processes (Applied Chemistry) - Various - Страница 387

I.—	Tannin	q. s.
Alcohol, q. s	1 part
Ether, q. s	3 parts

Make into a mass, using as an excipient the alcohol and ether previously mixed. Roll into pencils of the desired length and thickness. Then coat with collodion, roll in pure silver leaf, and finally coat with the following solution of gelatine and set aside to dry:

Gelatine	1 drachm
Water	1 pint

Dissolve by the aid of a gentle heat.

When wanted for use, shave away a portion of the covering, dip the pencil into tepid water and apply.

II.—Pencils for stopping bleeding are prepared by mixing:

Purified alum	480 parts by weight
Borax	24 parts by weight
Oxide zinc	2 1/2 parts by weight
Thymol	8 parts by weight
Formalin	4 parts by weight

Melting carefully in a water bath, adding some perfume, and forming mixture into pencils or cones.

A very convenient way to form into pencils where no mold need be made is to take a small glass tube, roll a piece of oil paper around the tube, remove the glass tube, crimp the paper tube thus formed on one end and stand it on end or in a bottle, and pour the melted solution in it and leave until cool, then remove the paper.