Username Post: I may have a strange question but...
aquabunny
Idol
Posts: 3895
Joined: 01-10-10
aquabunny

    In response to jessielee

It looks like there are lignin-testing pens on the market, but mostly for use by library preservation/conservation groups. The only reference I've found as to where to buy one - and the only scrapbooking-related reference I see to it - go to books.google.com, search for "lignin testing pen" (without the quote marks), and the first result should be a page from a 2004 issue of Creating Keepsakes that talks about acid and lignin testing pens.


 
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