Rubber bands not only cut into the edges of sheets, but they also deteriorate and release sulphur compounds which harm paper. Paper clips, staples, and pins all have a tendency to rust and stain paper. They may also tear the paper and leave permanent holes. They are now hard, blackened, and fused to the paper. Also note the rusting paper clip.
Safer materials are available which perform the same functions with little or no damage.
Substitute woven tape for rubber bands, and use plastic clips and rustproof staples instead of the metal joiners. Labeling When labeling and marking materials, always use reversible methods if possible. Irreversible methods must be safe for the materials they are used on. If possible, mark materials and write labels using pencil, since it is reversible. If ink must be used, permanent inks are recommended.