Features: 1) Materials: a) Cover: i) Outer: special paper ii) Middle: 1.00 - 2.00 grey board iii) Inner: 80 - 100 wood free paper b) Inner: 128 - 250g art paper or ivory board 2) Print: 4-color printing and gold foil or silver foil 3) Finish: varnished 4) Binding: spiral binding