Patent ID: 6243161
Filing Date: 2001-06-05
Classification: B41J,B41M

Abstract:
An image-forming liquid medium comprising:a solution that contains a surface-active agent;at least two types of microcapsule, a first type of microcapsule filled with a first dye, and a second type of microcapsule filled with a second dye, said two types of microcapsules being mixed with said solution,wherein said first type of microcapsule exhibits a first pressure/temperature characteristic such that, when said first type of microcapsule is squashed and broken upon being simultaneously subjected to a first predetermined pressure and a first predetermined temperature, said first dye seeps from said squashed and broken microcapsule, and said second type of microcapsule exhibits a second pressure/temperature characteristic such that, when said second type of microcapsule is squashed and broken upon being simultaneously subjected to a second predetermined pressure and a second predetermined temperature, said second dye seeps from said squashed and broken microcapsule, said first predetermined pressure being higher than said second predetermined pressure and said first predetermined temperature being lower than said second predetermined temperature.