Both the 1" and 2" tapes are used to hinge covers, reinforce pamphlets, repair covers and loose pages. They use a strong, acid-free linen fabric coated with neutral pH adhesive. While the repair is permanent the tape may be removed with mineral spirits if desired. Use 1' tape for attaching covers to signature. Use 2" tape for assembling cover blanks and general book repair. Both are gummed, water-activated.