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ASTM D6657-2008 测定湿铬鞣革的pH值的标准试验方法

ASTM D6657-2008 测定湿铬鞣革的pH值的标准试验方法

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资料描述

【英文标准名称】: Standard Test Method for pH of Wet Blue
【原文标准名称】: 测定湿铬鞣革的pH值的标准试验方法
【标准号】: ASTM D6657-2008
【标准状态】: 现行
【国别】: 美国
【发布日期】: 2008
【实施或试行日期】:
【发布单位】: 美国材料与试验协会(US-ASTM)
【起草单位】: D31.02
【标准类型】: (Test Method)
【标准水平】: ()
【中文主题词】:
【英文主题词】: acacidity; alkalinity; blue stock; Delta pH; pH; pH difference; wet blue; wet white; pH; Wet blue
【摘要】: This test method is designed to measure the pH of a distilled-water extract of wet blue. This is considered to be a measure of the acidity or alkalinity of the wet blue. Excessive acidity or alkalinity may have a deleterious effect on the aging characteristics of wet blue and the leather made from it. This test method is suitable for development, control, and service evaluation of wet blue.1.1 This test method covers the determination of the pH of all types of wet blue and wet white. 1.2 For pH of wet white, the procedure is identical, substitute wet white for wet blue in the standard method. 1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
【中国标准分类号】: Y45
【国际标准分类号】: 59_140_10
【页数】: 2P.;A4
【正文语种】: 英语

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