Faded signature

From: Kim Ohm <*rest.ohm*> Date: Monday, May 28, 2001 · rest.ohm

I have a problem concerning a signature on a print from an artist
who worked in the 20th and 30th of the twentieth century. This blue
signature (material unknown) has faded out through time. Has anyone
an idea how to retransform it into an almost original condition by a
chemical reaction?

Kim Ohm

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                  Conservation DistList Instance 15:1
                  Distributed: Wednesday, June 6, 2001
                        Message Id: cdl-15-1-018
                                  ***