| 摘要 |
<p>PURPOSE:To obtain the title ink suitable for heat-sensitive paper, etc., providing holograph free from change of color by dispersing specific fluorescent pigment into an aqueous medium. CONSTITUTION:For example, preferably 10-30wt.% fluorescent pigment having >=70wt.% cumulative distribution percentage of particles having 0.2-3.0mum particle diameter is dispersed into an aqueous medium comprising >=50wt.% water and 1-40wt.% wetting agent such as ethylene glycol to give the objective ink.</p> |
