A HEAT-SENSITIVE LITHOGRAPHIC PRINTING PLATE PRECURSOR

摘要

According to the present invention a printing plate precursor which is sensitive to near infrared light ranging from 700 nm to 1500 nm is disclosed. The printing plate precursor comprises an aluminum- silicon alloy support and a heat-sensitive coating, characterized in that the amount of silicon in said alloy ranges between 1% by weight and 20% by weight and that said support is capable of absorbing infrared light and subsequently converting it into heat at an extent sufficient to induce a lithographic image after exposing and optionally developing said precursor.