Elementary treatise on the finishing of white, dyed, and printed cotton goods . 74. Prints leather finish. 67. Ammoniacal apparatine thickening(Pus ch e r). 1 kilo Wheat starch6 litres WaterMake into a paste and add by degrees60 gr. Ammonia. The liquor is of a clear yellow color andthickens considerably and is afterwards dilutedwith 5 litres water, then boil the whole and stirconstantly. The preparation when ready becomestransparent and loses almost the whole of theammonia by boiling (Method of using as per for-mula 65.) 68. Weighted thickening with paperpulp (American method). Instead of chin
Elementary treatise on the finishing of white, dyed, and printed cotton goods . 74. Prints leather finish. 67. Ammoniacal apparatine thickening(Pus ch e r). 1 kilo Wheat starch6 litres WaterMake into a paste and add by degrees60 gr. Ammonia. The liquor is of a clear yellow color andthickens considerably and is afterwards dilutedwith 5 litres water, then boil the whole and stirconstantly. The preparation when ready becomestransparent and loses almost the whole of theammonia by boiling (Method of using as per for-mula 65.) 68. Weighted thickening with paperpulp (American method). Instead of china clay, alabaster etc. Richterof New-York uses paper pulp which he mixes 380 THE VARIOUS PROCESSES OF 77. Printed brilliante blued and stiffened. THE VARIOUS PROCESSES OF FINISHING. 381 with the ordinary thickenings. The pulp or pastemust be chosen according to quality of fabrics tobe stiffened. The method of using is the same as for theother thickenings and the goods may be glazedcalendered etc. This kind of thickening is speciallysuitable for stiffening for bookbinders cloths. 69. Weighted cellulose thickening(Har tmann). Fabrics stiffened by this process are usedchiefly for linings, buckram, plasters for medicalpurposes, dolls clothes, designing paper etc. Ordinary white cellulose well washed andrefined is mixed with potato starch and boiled inan autoclave boiler, constantly stirring. Starch on large engraved roller mangle asper diag. fig. 9, pi. II. Pass the still damp star-ched goods between 2 bowls of hardened caut-chouc, which thus presses the mixture into thefabric. Dry in the Hot-flue apparatus, then ca-lender dull, glazed or embossed finish as required. 382 THE VARIOUS PROCE
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