Nonvolatile Residue in Wipers and Other Material
Nonvolatile Residue (NVR) in Wipers and Other MaterialMatter Extractable from Wipers and Other Materials
"Distinct from the questions of the burden of ionic content and the generation of particulate debris, is the issue of the quantity of matter accessible to a given solvent from a wiper (or other item) destined for use in a cleanroom. Since, for a given solvent, the total mass of soluble matter is a unique and unequivocal quantity, we at ITW Texwipe chose to employ a method of testing which is aggressive and thorough in the extraction of that quantity. The method is designed to extract the residue in its entirety to a high degree of certainty. This method is generally more thorough in the extraction of residue than other commonly used methods...."