Review on 📝 Lineco Paper pH Testing Pen: Optimized for Paper and Paperboard Products. by Wendy Rodriguez

This acidity test pen takes the guesswork out. Is this paper acid free? I was pleasantly surprised that my card stock, which I bought for occasional printing, is already acid free too! Now it's one of my must-have tools for creating books and magazines. If I do all this work to create beautiful things with important information - I want them to still be beautiful and useful for my grandson in 30 years! Since this moment. everything must pass the PEN TEST.