Reply To: Acid Test Pen, Folder test question Welcome to Connecting to Collections Care › Forums › Group Forums › C2C Community Archives – 2012 through 2014 › Acid Test Pen, Folder test question › Reply To: Acid Test Pen, Folder test question September 26, 2013 at 5:20 pm #132396 Marybeth TomkaMember Iona, Very good point about wiping off the felt tip! Would you say the Carr-McLean tip is testing acidity and lignen? Marybeth
