Reinforcing Manuscript Pages Weakened By Iron Gall Ink With Precoated Tissue: quick, subtle, and reversible (?) techniques

Abstract

This poster presents a practical method for reinforcing fragile manuscript leaves damaged by iron gall ink corrosion. The technique is particularly suitable for treating bound manuscripts, where entire leaves—rather than isolated areas—may require stabilization. In such cases, overall reinforcement or lining is often more effective than localized mending. Building on research by Rouchon et al. (2009) on the harmful effects of moisture, Pataki (2009) on precoated tissues, and Jacobi et al. (2011) on low-moisture mending, this method employs dry application of precoated tissue, which is reactivated in situ using a dilute solution of Klucel G (hydroxypropylcellulose) in isopropanol. This approach offers precise placement of the reinforcing tissue and controlled adhesive activation. Additionally, it eliminates the need for added drying weights, making it gentler on brittle and distorted leaves. The technique is demonstrated using images from a bound manuscript dating to circa 1800. Finally, the poster shows how the treatment can be reversed: exposure to ethanol vapor softens the Klucel G adhesive, allowing it to be gently and selectively removed from the manuscript.