Pressure sensitive record material uses a 2,3-disubstituted-1,2,3,4-tetrahydroquinazolin-4-ones of the formula (I): ##STR1## where R.sub.1 and R.sub.2 have defined meanings, as color formers. Preferred compounds of formula (I) are intense fade resistant and stable yellow color formers useful in making black copy formulations.
压敏记录材料使用公式(I)中的2,3-二取代-1,2,3,4-四氢
喹唑啉-4-酮作为
显色剂:##STR1##其中R.sub.1和R.sub.2具有定义的含义。公式(I)的优选化合物是强烈的耐褪色和稳定的黄色
显色剂,可用于制备黑色复印配方。