[Table of Contents] [Search]

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: pH testing pen source

At 10:13 AM 9/8/99 -0400, you wrote:
>TALAS might have them, but so do Gaylord, and University Products. Don't
>know how conterfeit id pens would do the same thing, though I suppose it
>might with some materials. The original is acidic, the fake alkaline, but
>what happens with a deacidified original, or a fake on acidic paper... Oh
>well. They'll just tell you a paper is acidic or neutral/alkaline, but not
>at what pH. Good for a quick benchmark, but not much else.

Hi Peter:

Thank you for your quick response to my inquiry.  in my web search, I came
across a wonderful comparison of different pens and exactly what color they
read on specific pH levels:



-Andy Darlow

            BOOK_ARTS-L: The listserv for all the book arts.
      For subscription information, the Archive, and other related
            resources and links go to the Book_Arts-L FAQ at:

[Subject index] [Index for current month] [Table of Contents] [Search]