PROC. ENT. SOC. WASH., VOL,. 21, NO. I, JAX., 1919 9 



gained from certain published statements concerning the value of 

 gasoline as a vermicide. 



The Dry Cleaning Process. 



We investigated what is known as the open rotary washer 

 system, as specified by the Dry Cleaning Branch, Salvage Division, 

 O. M. C. The specifications read as follows: 



( )PEN ROTARY WASHER SYSTEM : 



(1) a. Goods shall be washed in Benzole, Naphtha or (.inxn/inc, specific gravity 



of which shall not be less than 56 degrees by Hydrometer test. 



b. One gallon of cleaning fluid shall be used to every two pounds of goods. 



c. Two ounces of Standard dry cleaning soap shall he used to every ten 



pounds of goods. 



d. One ounce of 26% ammonia shall be used to every twenty-live pounds 



of goods. 



e. All goods shall be washed 30 minutes and rinsed 15 minutes. 



/. All clothing must be extracted for a period of not less than 3 minutes 

 between the wash and the rinse. 



g. Cleaning or washing fluid to be used once; rinsing fluid once, only for 

 rinsing, after which it may be used for washing fluid, once only, 

 by adding soap and ammonia as specified in paragraphs (b) and (c). 



h. All cleaning fluid used for washing shall be new, distilled or ciirined. 



i. All cleaning fluid used for rinsing shall be new or distilled. 



j. After cleaning, all goods shall be inspected and all spots removed by 

 a process known as "spotting," after which, if garments are not 

 satisfactory, they shall be steam cleaned by the following method: 

 Goods to be immersed in water at temperature of hand heat, which 

 contains enough carbonated soda to soften the water, after which 

 they shall be brushed with a neutral soap mid water at hand heat, 

 after which they shall be rinsed in two waters at hand heat and dried, 

 as in (2c). 



(2) a. After goods are cleaned they shall be run in a drying tumbler at a 



temperature not less than 160 degrees for 30 minutes, the tempera- 

 ture to be taken at point of discharge of air from tumbler. 



b. If a dry room is used, goods, after being thoroughly dried and de- 



odorized, shall hang in the dry room at a temperature of not less 

 than 160 degrees for 30 minutes, after which they shall be run in 

 a dust wheel for 20 minutes. 



c. After goods are wet cleaned, they shall be dried in drying rooms m 



open air at a temperature not exceeding Kill drives Fahrenheit 

 (71.1 C.). 



The Smith system of dry cleaning differs only slightly from the 

 open rotary washer system, and the conclusions reached from the 

 study of the open rotary washer system will apply equulK to the 

 Smith system. 



