A grinding and cutting process and articles employing an effective amount of a grinding aid, typical of which is sodium nitrite which, when applied to the abradant or cutting edge of a tool, accelerates the modification of a metal workpiece and prolongs the useful life of the tool. The grinding aids...http://www.google.com.au/patents/US4239501?utm_source=gb-gplus-sharePatent US4239501 - Method for preserving the grinding characteristics of a grinding tool
