Methyl Cellulose is an acid-free adhesive, often used for bookbinding and paper repair. Effective when added to PVA glues to extend the drying time and allow for repositioning. Also, is often used for marbling bath, although it is less effective than carrageanan. Comes in powder form. Mix one pint warm water. to 1 or 2 tablespoons of powder, depending on desired viscosity.