[DaJudge]

The company I work for does historical document preservation. They use a marker that detects acid and ph levels in old documents. Every old document that is not preserved properly has acid in it. The point is that when I am looking at a vehicle's documentation I bring one of those markers. You put a small mark on a page or sheet if it turns yellow it has acid in it, if it turns purple it is acid free. The guys tell me that documents from the 90's forward are usually acid free. Just about everything pre 90's has some acidosis (spell check).

The marks disappear in about a half hour, this is a useful tool. If a buildsheet is pulled out of the car when new and inserted in an acid free protector then that would be the exception to the rule, but how often has that been done? I will get the name and company that makes these pens and post on Monday.