Why are Limited Edition Lithographs signed in Pencil and not Ink?
Limited edition lithographs are signed and numbered with a graphite pencil to guarantee authenticity of the signature. Signatures signed in ink can be reproduced on an offset printing press, or with an ink stamp, while graphite pencil signatures cannot be reproduced. In some rare cases, the lithograph print can be signed in ink, but the general practice is to sign with a dark, soft lead, graphite pencil. I personally use a 4B or 6B pencil.
