Beschreibung:
<jats:title>Abstract</jats:title>
<jats:p>The results of tests carried out in the laboratories of the London Advisory Committee show that when sheet rubber is prepared by coagulation of latex with sulfuric acid: (1) Only a trace of free sulfuric acid remains in the dry rubber. (2) The rubber is somewhat easier to manipulate in rubber manufacturing operations than that prepared by coagulating latex with acetic acid. (3) The rubber has satisfactory mechanical properties when vulcanized in rubbers sulfur or accelerator mixings. (4) The rubber ages satisfactorily in rubber-sulfur and accelerator mixings. (5) The use of sulfuric acid would tend to increase the variability in vulcanization of first-grade rubber unless its use became general.</jats:p>