178 TRANSACTIONS OF THE [JUNE 6, 
Scartet Lac Dye Spirits. 
Nitric Acid. ; - : . 2 parts. 
Muriatic Acid . , : : . i part: 
Water... . 2 parts. 
Slowly add 2 ounces of feathered Tin to each pound of this liquid. 
If the Tin be added in too great a quantity at once, it will fire the 
Spirits, precipitate Oxide of Tin, and render the spirits useless. It 
generally takes about 2 days to make good Lac Spirits. 
For 100 pounds of wool (clean) :-— 
15 pounds of Lac Dye, 5 pounds of White Tartar, and 5 quarts 
(imperial) of above Spirits. 
Boil solution 20 minutes, cool off a little, enter wool, and boil 1 
hour ; shut off steam and let it soak at least 8 hours, then rinse (if 
yarn, rinse in cold water; if wool, rinse in water at 100° F. ). 
Use more or less Lac Dye, according to shade. 
CocHINEAL SCARLET. 
Same as Lac Dye, with the exception that the Spirits are entirely 
of Muriatic Acid, with 2 ounces of Tin to each pound of acid, ana 
the Tin may be added all at once without danger. 
Use one-third less Cochineal than Lac Dye. 
YELLOW (QUERCITRON). 
Wool (clean) -. : ; : . 100 pounds. 
Quercitron Bark 3 5 . 10 pounds. 
White Tartar . . ‘ 2 : 5 pounds. 
Muriate of Tin : 5 5 quarts. 
Treat in same manner as Scarlet Lac Dye. 
There is no yellow colored with Fustic nowadays, and Welds are 
only used on silk. 
INDIGO-BLUE. 
There can be no recipe given for indigo-blue that would be of any 
service on a small scale. The following is used in a dye-house near 
New York. 
Put into a vat 7 by 7 feet, heated oY a coil to 160° F. 
Woad . : . 900 pounds. 
Indigo . : : : : . 30 pounds. 
Madder . . : : : . 10 pounds. 
Wheat-bran. ; 5 pounds. 
After standing 12 hours it will require from 15 to 30 quarts of 
sifted Caustic Lime, added gradually (about 2 quarts at a time) in 
the course of from 48 to 72 hours. 
It will be at once seen that the success of the process depends 
upon the skill of the operator. 
