| 摘要 |
PURPOSE: To prevent an offset phenomenon which occurs at the time of pressure pseudo adhesion by reducing an oil absorption of a pressure pseudo adhesive layer, adding a particle filler whose average particle diameter is very small to the layer, and making its surfaces adhesive to each other by folding pressure. CONSTITUTION: On one face of a sheet base material 10A to be an upper sheet 10, a coupler layer 10B which contains microcapsules having colorless coloring matter sealed therein is formed. On one face of a sheet base material 20A to be a lower sheet 20, a pseudo adhesive layer 20B having a developer which develops a color by adsorbing the coloring matter sealed in the microcapsules which are broken by pressure printing, a particle filler having 100ml/100g or less of oil absorption regulated by JIS-K-5101 and 20μm or less of average particle diameter, and a pseudo adhesive is formed. The pseudo adhesive layer has pseudo adhesion by which its surfaces can be adhered by folding pressure so as to be in contact with each other. One face of the upper sheet 10 and one face of the lower sheet 20 are superposed and printed by pressure printing, the upper and lower sheets are separated so as to keep the upper sheet as a duplicate. |
