The dyeing of textile fabrics . conductor of electricity, and sinceit readily becomes electric by friction, this condition, onceacquired, is very persistent, and is apt to become a sourceof trouble during the mechanical ojjerations involved inmanufacturing. The most eflective mode of overcomingthe difficulty is to keep the atmosphere of the work°rooms in a suitable state of humidity. In its boiled-off and pure state silk resists ordinarydecay most thoroughly, and it is rarely attacked byinsects. 47. Silk Conditioning.—If raw sQk be kept in ahumid atmosphere it is capable of absorbing thirty pe
The dyeing of textile fabrics . conductor of electricity, and sinceit readily becomes electric by friction, this condition, onceacquired, is very persistent, and is apt to become a sourceof trouble during the mechanical ojjerations involved inmanufacturing. The most eflective mode of overcomingthe difficulty is to keep the atmosphere of the work°rooms in a suitable state of humidity. In its boiled-off and pure state silk resists ordinarydecay most thoroughly, and it is rarely attacked byinsects. 47. Silk Conditioning.—If raw sQk be kept in ahumid atmosphere it is capable of absorbing thirty percent, of its weight of moisture without this being at allperceptible. This circumstance, coupled with th^e highprice of raw silk, makes it of very gi-eat importance tothose who trade with it to know exactly what weightof normal silk there is in any given lot which maybe the subject of commercial dealings. To ascer-tain this information there have been established, inabout thirty-seven centres of the silk industry, so-called. Fig. 22.—Canditioaiiig Appiatos. Chap. IV.] CONDITIONING. 61 conditioning establishments, , in Lyons, CrefeldZurich, Bale, Turin, Milan, Vienna, Paris, London,&c., &c. Fig. 22 shows the external appearance of the essential apparatus ofsuch an establish-ment, namely,the consists of anenamelled cylin-drical hot - airchamber. Onearm of a finebalance sustainsa crown of hooks,to which are at-tached the skeinsof silk to bedried. The sus-pending wirepasses through asmall opening inthe cover of thecylinder. Theother arm of thebalance carriesthe ordinary panfor weights. Fig. 23 gives
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectdyesanddyeing, bookye
