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Effeot on Paints, Plastios, and Other Synthetic Materials- 
All these repellents are solvents of paints, varnishes, and many 
of the plastics# They must be used with caution, as they will damage 
such materials as plastic •watch crystals, synthetic cloth (sh«rkskin7 
rayons, etc,)fingernail polish, and articles that are painted or 
varnished or made of plastios . These chemioals will not damage cotton 
or wool cloth if such cloth contains no synthetic fibers. 
Use Against Mosquitoes, Flies, and Biting Gnats 
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Repellents must be uniformly distributed over the area to be 
protected# Otherwise the insects will seek out and bite in any small 
area where the repellent was not thoroughly applied. 
Applications to skin .— All these repellents feel oily on 
the skin and for this reason may be objectionable to use. However, 
materials of this type give more complete and longer protection than 
do -die less viscous materials, which either evaporate or are absorbed 
shortly after application. Beoause the conditions of use are, variable, 
the only rule to follow is to apply when the insects resume biting on 
the treated areas. Under favorable conditions one treatment may 
last several hours on some people, and not so long on others. 
The most common method of using repellents from the bottle is to 
shake a few drops into the palms, smear evenly, and then apply thoroughly 
to the backs of the hands, wrists, neck, ears, face, or any other 
exposed skin, muoh as in washing. This procedure should be repeated 
until a uniform oily film is applied. 
Applications to olothing .-- In some localities mosquitoes 
cause considerable annoyanoe by biting through clothing. Under 
such conditions repellents may be sprayed or daubed on clothing 
where the bites ooour. This treatment may be expected to last several 
days if the clothing remains dry. One soaking with water, however, 
removes enough of the repellent to make treated clothing non-effeotive„ 
(See Effeot on Paints, Plastios, and Other Synthetic Materials). 
A simple method of applying repellents to clothing is to shake 
about a dozen drops of the repellent from the bottle into on® hand, 
rub the hands together, and rub lightly on sooks, shirts, or trousers 
where bites occur. Repeat this procedure until the areas to b© 
treated have been covered. The repellents may be applied to the 
olothing also with a small hand sprayer. Spray lightly the areas 
where the insects are biting through the olothing. 
