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BELL SYSTEM TECHNICAL JOURNAL 



obtained by observing the extent to which the textile fibers have been 

 laid and covered by the lacquer film. If the surface of the wire is 

 smooth and practically free from projecting fibers as is shown in the 

 photograph, the wire may be expected to exhibit normal improvement. 



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Fig. 1 — Textile insulated 22-gauge wires before and after treatment with cellulose 

 acetate. The cellulose acetate covering prevents direct contact between textile 

 fibres of adjacent wires and reduces current leakage. 



For example, when textile insulated conductors are twisted and then 

 treated with cellulose acetate, practically no improvement in electrical 

 characteristics of the pair is obtained, because the interlocking fibers 

 of the two conductors which provide the direct leakage paths are not 

 separated. A similar effect has been observed in the treatment of coils 



