Principles and practice of butter-making . treatments mentioned. Paraffin furnishes no food for molds; if there be any moldorganisms on the woodthey will probably be de-stroyed to a very greatextent, if not entirely,either by the hot paraffinspray or through the ex-clusion of the air whichthey require for growth;and, even faihng this,the coating of paraffinshuts them off from theparchment paper and thebutter. Furthermore, asparaffin is impervious towater, the space between the liner and the tub remains filledwith water or brine which excludes the air and retards or pre-vents the development of
Principles and practice of butter-making . treatments mentioned. Paraffin furnishes no food for molds; if there be any moldorganisms on the woodthey will probably be de-stroyed to a very greatextent, if not entirely,either by the hot paraffinspray or through the ex-clusion of the air whichthey require for growth;and, even faihng this,the coating of paraffinshuts them off from theparchment paper and thebutter. Furthermore, asparaffin is impervious towater, the space between the liner and the tub remains filledwith water or brine which excludes the air and retards or pre-vents the development of any molds that may be present. Paraffining Tubs Reduces Loss from Shrinkage.—Anotherstrong inducement to paraffin tubs is the saving in shrinkage,due to the prevention of the escape of moisture. In an experi-ment made by Rogers, during his investigations, he found theshrinkage, during a period of eight days in creamery storageand in transit, on butter packed in paraffined tubs and in tubssoaked in brine, respectively, to be as follows:. Fig. 125.—Tub paraffiner. (CreameryPackage Mfg. Co.). Treatment of Tubs j Weight of ButterNumber of 1 (Pounds) ShrinkagePounds ^•^^ When Packed After EightDays Parafi&ned 12 7S7f 756 if 12 . 766I i 71^0 7t Soaked * 304 PREPARING BUTTER FOR MARKET Thus the saving in shrinkage, through paraffining, was6 pounds on 12 tubs or half a pound per tub. With unsoaked, paraffined tubs the tare should be markedon the package. Such tubs may be as much as 2 pounds Hghterthan soaked tubs. Treatment of Parchment Paper.—As parchment paper is agood medium for the growth of mold organisms and may harborthe spores, though showing no growth of mold, it is quite asimportant to treat it as to treat the tubs for the prevention ofmold. One method of treatment for parchment paper is tosoak it for at least ten minutes, before using, in a saturatedsolution of brine at or near the boiling point. Russell and Hast-ings ^ say, A most efficient way of treating paper, e
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