420 



THE INDIA RUBBER WORLD 



[AUGLST 1, 1911. 



none would be found. Then the two batches were to be com- 

 bined and M) per cent, of water added and the rubl)cr would 

 form, slowly but certainly, as the small particles coagulated 

 and floated to the surface. This looked good, but the eccen- 

 tricity of genius again asserted itself, and the inventor failed to 

 produce the mixture or even to keep the engagement. He 

 pleaded illness and a new date was arranged. This time he 

 plead lack of opportunity as he had been busy working on a 

 new refrigeration process. So the great corporation ju^t gave 

 it Up. 



The inventor's formula in escrow in Xew York is apparently 

 tied up, but the chemist's formula was lifted and followed out 

 and the result had about as much elasticity as a piece of machine- 

 made pie crust. Perhaps some of the chemical readers of the 

 IxDi.v RfBBER World would like to try it. Hurc it is: 



fPb. A y, lb. 



a \ H:0 1 qt. 



[ Pb. O Vz\h. 



One pound of PbO in 1 gallon of linseed oil, shake thor- 

 oughly, then mix in lead solution (a), shake well and settle. 

 After settling., filter or decant and work well with very 

 dilute H;SO. — enough to precipitate all lead in solution. 

 Mix 500 cc. of a dilute solution of H-SO* (^) to the 

 filtrate of 2;<5 gallons of the treated oils. Settle over night 

 and filter. One qt H NO sp. grav. 1.2S, ^ qt. H: 3S0. 

 strong. Mix and cool, then add this amount to J4 gallon 

 of the above filtered oils. Stir slowly in a large open porce- 

 lain-lined iron evaporating dish. Stir now and again. Take 

 1 qt. above mixture, add 6 ozs. H NO3 plus 1 oz. H,SO. 

 and heat to 140 degs. Fahr., with constant stirring, when 

 action commences and frothing, stir until boiling ceases. 

 Add 3 gallons of water when cold. Allow to stand 12 

 hours. Pour off water and repeat for four days. 



For one pound of above product dissolve in CS,. 



One quarter pound glue in FLO, hot ; 2 drams. KjCr.Oi 

 in 8 ozs. H.O. mix with terpentine, make a solution ; add 

 5-4 lb. NA2CO.1 ; expose to light several days, and then mix 

 with the CS, solution and treat to form the required 

 product. 



The formula devoid of chemical terms is thus given by one 

 of the V\'estern officials : 



FIRST ACT. 

 Remove Glycerine From Oil. 



(a) Take one gallon of well-settled Linseed Oil, to which 

 add 3 oz. of Litharge ; mi.x well with stick or blow with air. 



( b ) Take one quart of rain water, heat to near the boiling 

 point, and just before it boils add, a little at a time, 14 ozs. of 

 Acetate of Lead. When the Acetate of Lead is all dissolved add 

 2 ozs. of Litharge. 



When solution (h) has become cool, add it to solution (a) 

 and stir the two well together. Blowing it with air is the best 

 method of mixing. The combined mixture of (a) and (b) make 

 solution (c). 



Solution (c) must be allowed to settle, the clear oil coming 

 to the top. 



SECOND ACT. 



Take one part of sulphuric acid and nine parts of water; mix 

 well. This makes the "acid solution." 



The clear oil resulting from the settling of solution (c) is 

 termed "treated oil." 



To three parts of "treated oil" add one part of the "acid solu- 

 tion." Stir well and allow to settle. This solution will settle in 

 two or three days, and the clear oil which appears on top is 

 termed "acid treated oil." 



THIRD ACT. 



Si.\ gallons of oil which has gone through the first and second 

 act (being what is termed "treated oil" and also "acid treated 

 oil") is put in a large wooden tank which would hold about 80 

 gallons. To this oil is added three gallons of nitric acid and 

 the mixture stirred violently with a stick, or blown with air 

 from the power air pump. Stirred for 10 minutes. 



.\fter this solution is well stirred, there is added to it one pint 

 of sulphuric acid, teacupful at a time. 



When there has been a pint of the sulphuric acid added, the 

 entire mixture begins to boil very actively. The "chemical 

 change" takes place so violently that the 300-gallon tank is en- 

 tirely filled with the mixture as it boils. The product obtained 

 from this "boiling" or "chemical change" is a "red sticky tar." 



This "red tar" which, when cold, has decreased in bulk to 

 about the original amount (or 7 gals.). 



FOURTH ACT. 



This "red tar" is put in a large wooden tank, which will hold 

 about 100 gals., and washed with flowing water. The water 

 must continue until the acid is entirely washed out, which takes 

 two or three days. 



The livshed "red tar" is then put into a ten-gallon crock. To 

 this is added three quarts of "Bi-sulphate of Carbon" and about 

 one gallon of water. The entire mass is allowed to rest several 

 days, and each day stirred three or four times, the tar being 

 slowly ciit by the Bi-sulphate. 



This cul "i'aslted "red tar" to remain in jar ten or twelve days. 



Glue Solution. 



Take 5 pounds of best-grade glue and soak in 16 quarts of rain 

 water, allowing it to remain until the water has taken up all 

 of the glue. 



To this dissolved glue 16 quarts of rain water is added and 

 boiled ten minutes. When this solution is boiling there is added 

 between one pint and one quart of turpentine and allowed to boil 

 five minutes longer. 



This entire solution is then put aside to cool. 



This glue solution, when cool, is put in a 20-gallon crock and 

 filled up with rain water. This 20 gallons of solution is then 

 put in a dry, warm place and there to remain until fermenta- 

 tion takes place. 



FIFTH ACT. 



When the "Glue Solution" is well fermented, which takes 

 about one week, the entire 20 gallons is put into an 800-gallon 

 wooden tank, in which there is about 300 gallons of rain water. 



The "Cut Washed Red Tar" is put into the large wooden tank 

 simultaneously with the 20 gallons of "glue solution." 



This entire solution of something over 300 gallons is stirred up 

 well and allowed to remain ten days, and each day is stirred sev- 

 eral times. During the ninth and tenth days there is added, in 

 all, about two (2) quarts of Bi-Sulphate of Carbon. 



.'Vt the close of the tenth or eleventh day there is added about 

 500 gallons of rain water. 



Three or four days after the 500 gallons of rain water has 

 been added, the rubber is to appear at the surface of the solu- 

 tion as it is stirred. 



This last act should take place in the sunlight, or in a building 

 with a glass roof. 



Sunshine is an important factor in the last stage. 



PLANTATION RUBBER BADLY PACKED. 



CoMPL.\iNTs have been many of late, according to Giimmi- 

 zeiiimg. concerning the bad packing of plantation rubber, the 

 chief count being the employment of cases that are not strong 

 enough. This, it is needless to state, is false economy, for it is 

 self-evident that the rubber, during protracted transportation, 

 will suffer therefrom. 



