DR. CERQUEIRA PINTO’S PROCESS 
EXTRA FINE PARA 
This rubber was cured for export in the rubber estate “IRA- 
CEMA,” in the Federal Acre, Amazonia, Brazil, by Dr. Cerqueira 
Pinto’s process of smokeless coagulation. (See The India Rubber 
World, August 1, 1909, page 396, and copy of the same journal 
of Ist September, the same year, page 435.) 
The enclosed sample contains 68 kilos and belongs to the lot 
of 5.000 kilos (11.025 lbs.) that Dr. Cerqueira Pinto holds to be 
sold in New York. 
Dr. Cerqueira Pinto’s process is one of coagulation of the 
latex of the “Hevea Brasiliensis” by an ingredient patented by 
the Brazilian Government—“LACTINA”—absolutely free of any 
acid. 
The latex after the coagulation is pressed through a cylinder 
in order to dry out. 
This rubber was tested and classified as of STANDARD type 
by the Government of the United States of America. 
It offers the resistance of 2,010 pounds per square inch accord- 
ing to the experiments made by The Manhattan Rubber Com- 
pany in July, 1909. This rubber means a saving to the manu- 
facturer of at least 20 per cent, in the opinion of the Favorite 
Rubber Mfg. Co. of New Jersey and of 25 per cent, as per the 
analysis made in London. 
The author of this process calls the Jury’s attention to his 
rubbers and is willing to furnish with the sufficient quantity in 
order to prove to the entire satisfaction of his assertions. It 
vulcanizes as well by acid as by vapor. Dr. Cerqueira Pinto will 
prepare, during the Exposition, in September, before the public 
and the manufacturers, his rubbers with both Hevea and Castillda 
latexes, yield of the trees in October, 1911, in the Federal Acre, 
Brazil. He shall present as well a large quantity of similar rub- 
bers cured by the author on different occasions. They are true 
rubbers of commerce cured for export. They are clothed by a 
vegetal varish, soluble in water, which is also a discovery of 
Dr. Cerqueira Pinto, to prevent the mould. 
CASTILLOA OR CAUCHO. 
Prepared by the process of Dr. Carlos de Cerqueira Pinto. 
(See the India Rubber World of September 1st, 1909, page 435). 
The included sample weighs 68 kilos. The author holds 1,400 
pounds of this quality to be sold in New York market. 
The article was cured by rubber laborers of the estate “TIra- 
cema” in the Federal Acre, Amazonia, Brazil, during the months 
of July to December, 1911. They are rubbers of commerce and 
cured for export. 
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