| 摘要 |
PURPOSE:To provide a copy sheet enabled in interpretation due to irradiation of ultraviolet rays, by containing a pigment emitting light by irradiating ultraviolet rays in a carbon ink layer. CONSTITUTION:A copy sheet A is constituted from a carbon transfer sheet 1 having a carbon ink layer 3 containing a pigment emitting light by irradiating short-wavelength ultraviolet rays and a carbon receiving sheet 2. As the pigment emitting no light by the irradiation of ultraviolet rays with a long-wavelength of 300-400nm but emitting light by the irradiation of near ultraviolet rays with a short wavelength of 200-300nm, tungstate such as calcium tungstate or magnesium tungstate and halide such as potassium chloride or manganese fluoride are represented and they are compounded in an amount of about 0.5-70wt% based on the total amount of carbon ink. The pigment is compounded in wax with a m.p. of about 30-120 deg.C to be used as a wax type carbon ink. |
