CAN ALL FOOD THAT CAN BE CANNED 



15 



FIG. 29 



FIG. 30 



FIG. 31 



CANNING IN TIN. FIG. 29. Wiping juice and syrup from groove. FIG. 30. Applying cap and wiping groove 

 with brush dipped in soldering fluid. FIG. 31. Placing clean hot capping steel on can and melting solder into groove. 



drives out the air which will cause the can to 

 bulge, giving it the same appearance as when 

 spoilage has occurred. After exhausting, 

 the cans are removed from the sterilizer and 

 the vent hole is closed. The cans are re- 

 turned to the sterilizer and sterilized, follow- 

 ing the time-table given on page 2. At the 

 end of the sterilization period remove cans 

 and plunge immediately into cold water. 

 Do not stack cans closely until cold. 



After packing, label each can by writing 

 the name of contents on the side. If in- 

 tended for sale affix a label just before shipping. 

 Do not allow paste to touch the can, as it 

 will cause the tin to rust. The label should 

 be large enough to encircle the can and over- 

 lap at the edges. Put the paste on one of the 

 overlapping edges and draw label tightly 

 around can, pasting the two edges together. 



To seal, wipe top of can clean and dry 

 and then put the cap in place, applying flux 

 carefully to the groove. Do not allow the 

 flux to enter can, as it is poisonous. Hold 

 the cap in place with the center rod and lower 

 the hot capping iron squarely and firmly on 

 the solder rim of the cap, or melt a little 



solder in the groove by holding the solder wire 

 against the lower part of the capping steel. 

 Revolve the iron to melt the solder and seal 

 the can. Lift the capping iron with a sudden 

 twist, holding the center rod in place. When 

 solder has hardened remove center rod. 



To tip, dry top of can and apply flux to 

 the hole in the center of the cap. Hold the 

 solder in the left hand, brush it with the hot 

 tipping iron so only a bead will drop and 

 close hole. 



The steels must be kept clean and well 

 coated with solder. To do this, if capping 

 steel is rusty, clean with a file, brick or emery 

 paper. To tin the capping steel heat and 

 dip in flux, then heat again until red hot and 

 dip in sal ammoniac and solder until well 

 coated. Sal ammoniac is made by mixing 

 equal parts of dry sal ammoniac with solder 

 chips. Coat the tipping copper in same way. 



Flux is made as follows: To muriatic acid 

 add strips of zinc until no more will dissolve. 

 Strain through a cloth and when ready to use 

 add an equal quantity of water. Flux which 

 is used for tinning the tools should not be 

 used for soldering. 



FIG. 32 



FIG. 33 



FIG. 34 



CANNING IN TIN, continued. FIG. 32. Turning steel to distribute solder. Fig. 33. Raising steel to allow 

 solder t9 harden after pressing down on center rod. FIG. 34. Sealing with drop of solder after exhausting can 

 and wiping vent hole. 



