MANUFACTURE OF CASEIN. 15 



DRAIN BACK. 



A drain rack such as is used in the manufacture of cottage cheese 

 is very satisfactory. It should be made either of cypress or of a good 

 grade of white pine. A frame 3 feet 4 inches wide by 6 feet 4 inches 

 long, outside dimensions, is made of surfaced 2 by 4 inch material, 

 using mortised joints and allowing the ends of the longer pieces to 

 project 3 inches. The frame is made by laying the 2 by 4 inch pieces 

 flat. On the inside edge of each piece a £-inch hole about 2 inches 

 deep is bored every 12 inches, and a ^-inch galvanized pipe of the 

 proper length is placed in the holes when putting the frame together. 

 The pipes support the wire screening and keep it from getting loose. 

 Three galvanized swivel casters are fastened to each side on the 

 bottom of the frame to allow the drain rack to be handled conven- 



Fig. 6. — Drain rack mounted on swivel casters allows most convenient handling, 

 especially when filled with curd.- s 



-v.' " 



iently. Galvanized-wire screening of four meshes to the inch is 

 nailed to the top of the frame with staples, talking care to draw it 

 tight and let it extend a little over the middle of the frame all around. 

 A wooden strip, wide enough to cover the edge of the galvanized 

 screening, is nailed around the outside edge of the upper part of the 

 frame to hold the top part in proper position. The top part is made 

 of 1| by 12 inch surfaced material with mortised and spiked corner 

 joints, each end of the side pieces projecting 6 inches. The projec- 

 tions, trimmed down to the shape of a handle, make the rack more 

 convenient. 



Two drain racks of the dimensions given are large enough to hold 

 the curd from 400 gallons of buttermilk. The curd drains quickly 

 in the drain racks, which permits them to be used repeatedly until 

 all the casein is made. 



PKESS FORM-DIVIDING BOARDS. 



The dividing boards placed between the layers of wet curd in the 

 press can be made conveniently from 1 by 1-J inch lattice-stop strips 



