From some recent reading I've done on the history of mat board, I've concluded that the use of acid and lignin free 100% cotton rag mat board is a whole different world than the materials used even 50 years ago....
...Museums that deal with vintage photographs of yesteryear have to deal with all manner of mat deterioation which is exacerbated by dry mounting. But, the current mat material I've just described obviates the need to avoid dry mounting I think.
John,
My thoughts exactly! Thanks for doing some research.
"lignin free", those were the words I was trying to remember. I called it "lignite free" in a previous post, which I now know would mean: doesn't contain any compressed peat moss (when I was a power plant piping analyst in the 70's and 80's one of our projects was an electricity generating plant in Texas that burned lignite for fuel, it was built on top of a large lignite deposit. I'm surprised that memory didn't ring a bell). I think I was close though, it still relates to woody material. I learn allot from this forum.
Paul

