392 PACKING BUTTER FOR U. S. NAVY 



"At the option of the Bureau of Supplies and Accounts, the 

 contractor or his agents may, however, be required to make all 

 the tests necessary to determine that the acid in the milk or 

 cream and the salt and water contents of the butter are within 

 the limits specified, and all such tests made by the contractor 

 or his agents shall be subject to supervision, verification, and 

 approval by Government inspectors. 



Containers Tinned Butter. 



"Tins. Tins to be made of prime coke plate weighing not less 

 than 90 pounds per box of 112 sheets, size 14 inches by 20 inches. 

 Side seams to be of either lock or lap type and soldered on out- 

 side only. Top and bottom ends to be lined with sanitary lining 

 compound of suitable gasket before being double-seamed on. 



"Tops and bottoms to be completely covered on the inside 

 and outside with processed lacquer so that there will be no un- 

 tinned edges exposed on the inside of the can. Inside and outside 

 of cans, tops, bottoms and sides, except necessary margin for 

 soldering side seams, to be lacquered before plate is manufac- 

 tured into the finished container, with processed lacquer, which 

 is to be baked on at a temperature of approximately 380 F. 

 The unlacquered margin of side seam to be covered with air- 

 drying lacquer after can is finished. 



"Two sizes of tins will be acceptable, viz., tins containing 5 

 pounds net weight, as used heretofore, and standard No. 10 

 sanitary type tins containing approximately 6 pounds 6 ounces. 



"The tins must be packed completely full, leaving no air 

 space. Net weight only to be paid for. 



"Packing. The butter must be packed in thoroughly clean 

 tins, and the tins fully sealed and marked immediately as di- 

 rected, the creamery where the butter is made, the butter to be 

 packed within two hours after the time of churning. 



"Sealing. Each tin must be hermetically sealed by mechan- 

 ical process, without the use of solder. 



"Cases. The cases shall be made of well-seasoned lumber, 

 planed on outside; tops, bottoms, and sides to be not less than 

 full y 2 inch and ends not less than full ^f inch thick when 

 finished. To be securely nailed and strapped with J^-inch flat 



