Tentative standard test methods and percentages of oil and moisture in hair press cloths.

Abstract

Hair press cloth is used in the oil-pressing industries in the extraction of the oil from the pulpy matter. Hair fibers are more generally used than others on account of the resiliency required. Since the fabric is bought on a weight basis, the moisture and oil which are added to permit efficient manufacturing become important items. This paper outlines means of ascertaining the various contents. The petroleum ether extraction method is used for obtaining the oil content. The results of testing 27 samples are given. The standard percentages obtained are as follows: Moisture, n per cent; oil, 5 per cent; water-soluble material, 2% percent. CONTENTS.