A local method for the stabilization of weakened iron gall ink areas in iron gall ink copy documents is presented. The special quality of iron gall ink copy process documents, made of thin, ink-permeable paper, is discussed, as well as the special quality of iron gall copying inks because these were modified by hygroscopic additives. These inks remain extremely water sensitive due to the additive and may suffer from ink corrosion. Selected analysis including iron(II) testing and micro pH extraction are reported. To prevent bleeding and to inhibit the progress of ink corrosion, the mechanical stabilization of weakened areas had to employ only minimal amounts of water. This involved coating Berlin Tissue (kozo-mitsumata fibre content) with gelatin, producing a prefabricated repair paper that is a variation of the well-known remoistenable tissue. The tissue is prepared in a separate step preceding its application on the object, and it is adhered with the aid of the suction table. The application of the remoistenable tissue is expedient, can be carried out with great precision, and minimises risks associated with the treatment and preservation of iron gall ink-corroded areas.