Preservation Technologies has partnered with Abbey Publications founder Ellen McCrady to continue production of the Abbey pH Pen. The agreement ensures that the pen will remain available for archivists, librarians and conservators to use to identify acidic or alkaline paper.The Abbey pH Pen is part of a legacy that includes the Abbey Newsletter and Alkaline Paper Advocate. These valuable, now-retired publications have been an important element of the campaign to preserve archival and library collections and advance the use of long-lasting paper for publishers, picture framers and the general public.
Ellen developed the Abbey pH pen 15 years ago as a simple tool to spot-test books and other dry paper materials for acidity. She chose chlorophenol red as the pH indicator agent, in part because it provides a consistent color response to a given pH level regardless of the agent’s concentration in the pen nib.