1.1本试验方法描述了测定书写纸表面和体积（体积）直流电阻率的程序。该测试方法适用于Keithley 6105电阻率适配器。 1.2本试验方法是作为特殊情况开发的，用于在电阻率控制至关重要的高速非冲击打印机中处理的书写纸。它与试验方法D 257不冲突。 1.3 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的用户有责任在使用前制定适当的安全和健康实践，并确定监管限制的适用性。 ====意义和用途====== 纸通常被认为是具有良好电绝缘特性的材料；例如，干燥时电阻率相对较高。然而，在某些应用中，将电阻率控制在规定范围内是一项重要功能，需要电阻率测量技术。 虽然可以使用各种仪器测量电阻率（测试方法D 257 )，该测试方法适用于Keithley 6105型电阻率适配器。 6. 精度声明基于该仪器的使用。研究表明，结果将因所用电阻率适配器的类型而异，如果要在同一实验室的不同仪器之间或不同实验室之间实现再现性，则在每次测定中必须使用相同的模型电阻率适配器。 本方法中提及的电源和静电计由Keithley制造，程序描述了它们的使用。据信，其他制造商制造的可比设备将用于相同目的。精度声明是使用Keithley设备开发的。 电阻率的控制在高速非冲击印刷机上特别重要，该特性将影响印刷、机器进给和处理，或两者兼而有之。电阻率在使用电子照相过程的非撞击式打印机或复印机的图像传递函数中很重要。电阻率是控制高速非撞击式打印机和复印机上静电积聚的一个重要因素。

1.1 This test method describes the procedure for determination of both surface and volume (bulk) d-c resistivity of writing paper. This test method is specific for the Keithley 6105 resistivity adapter. 1.2 This test method has been developed as a special case for use on writing papers processed in high-speed nonimpact printers where resistivity control is critical. It is not in conflict with Test Methods D 257. 1.3 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. ====== Significance And Use ====== Paper generally is considered to be a material having good electrical insulating characteristics; for example, relatively high resistivity when dry. However, in certain applications, control of electrical resistivity to within specified limits is an important function, and resistivity measurement techniques are required. While it is possible to measure resistivity using a variety of instruments (Test Methods D 257 ), this test method is specific for the Keithley Model 6105 resistivity adapter. 6 The precision statement was based on the use of that instrument. Studies have shown that results will vary depending upon the type of resistivity adapter used and if reproducibility between different instruments in the same laboratory or between different laboratories is to be achieved, it is essential that the same model resistivity adapter be used in each determination. The power supply and electrometer referred to in this method are manufactured by Keithley and the procedure describes their use. It is believed that comparable equipment manufactured by others would serve the same purpose. The precision statement was developed with Keithley equipment. The control of resistivity is of special importance on high-speed nonimpact printing machines where that characteristic will affect printing, machine feeding and handling, or both. Resistivity is important in the image transfer function of a nonimpact printer or copier using the electrophotographic process. Resistivity is an important factor in controlling static buildup on high-speed nonimpact printers and copiers.