PARAFFINING TUBS REDUCES LOSS FROM SHRINKAGE 303 



apparatus for spraying the inside of the tub with paraffin 

 should be used. 



As it only requires about 3 ounces of paraffin for a tub that 

 holds 60 to 65 pounds of butter the cost is not great, and the 

 work entailed in paraffining is no greater than that of either of 

 the other treatments mentioned. 



Paraffin furnishes no food for molds; if there be any mold 

 organisms on the wood 

 they will probably be de- 

 stroyed to a very great 

 extent, if not entirely, 

 either by the hot paraffin 

 spray or through the ex- 

 clusion of the air which 

 they require for growth; 

 and, even failing this, 

 the coating of paraffin 

 shuts them off from the 

 parchment paper and the 

 butter. Furthermore, as 

 paraffin is impervious to 

 water, the space between the liner and the tub remains filled 

 with 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. Another 

 strong 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 the 

 shrinkage, during a period of eight days in creamery storage 

 and in transit, on butter packed in paraffined tubs and in tubs 

 soaked in brine, respectively, to be as follows: 



FIG. 125. Tub paraffiner. (Creamery 

 Package Mfg. Co.). 



