Publicado no e em "Negócios, Negócios", idioma — English. 6 páginas.
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Vegetable parchment (paper) is made by passing a waterleaf (an unsized paper like blotters) made of pulp fibers into sulfuric acid. The sulfuric acid hydrolyses and solubilises the main natural organic polymer, cellulose, present in the pulp wood fibers. The paper web is then washed in water, which stops the hydrolysis of the cellulose and causes a kind of cellulose coating to form on the waterleaf. Mais
