It's amazing how a piece of paper can sound so complicated Here's a desciption of the stuff I use (Filmoplast R): "This transparent technical Japanese Mulberry Paper (pH 8.9) is coated with an acrylic adhesive for use in the restoration, repair, and embedding of modern acidic papers. The adhesive is free of plasticizers, is age resistant, colorless, non-yellowing and buffered with magnesium carbonate. The adhesive is activated at a temperature of approximately 120 degrees C/ 250 degrees F, and can be applied with a heat press, heated roller type laminator or tacking iron for spot mending. The adhesive is soluble in acetone and can also be removed by careful reheating."