Chloride test pencil

I've seen pH test pencils...the kind you use to make a mark on paper
and the mark leaves a colored indicator on the paper.  Has anyone
seen or heard of chloride test pencils that work in a similar way?

Katharine Untch
Conservator
Architectural Resources Group
Pier 9 The Embarcadero
San Francisco, CA 94111
katy [at] argsf__com
415-421-1680 ext: 247
Fax: 415-421-0127


                                  ***
                  Conservation DistList Instance 19:43
                  Distributed: Monday, March 13, 2006
                       Message Id: cdl-19-43-018
                                  ***