A book contains 25 leaves, a pack contains 20 books, or 500 leaves. A book covers 2 square feet; a pack covers 40 square feet.
Loose leaf (Surface) books have a thin tissue paper between each leaf. Each leaf may be fitted with a gilder's tip without disturbing the next leaf.
(Patent) Transfer leaf, is leaf which is bound to tissue paper by pressure. The leaf is released from the backing tissue when pressure is applied. Best for outdoor work on flat surfaces, so goldleaf doesn't fly away.
These books contain 25 sheets of professional grade, Imitation or Composition Leaf and can be chemically patined for interesting effects. Will tarnish if left unsealed.