heliotype

n. 胶版, 胶版画

形容词:heliotypic 

he.li.o.type

n.Printing （名词）【印刷术】
A photomechanically produced plate for pictures or type made by exposing a gelatin film under a negative, hardening it with chrome alum, and printing directly from it.
珂罗版印刷法：一种通过照相制版工艺制造出来的用于印刷图片或文字的图版，将一层胶制剂薄片置于底片之下，用硫酸铬钾使之坚硬，然后便可直接印刷
Also he.li.o.typ.y [-to.pô] The process of producing a heliotype.
也作 he.li.o.typ.y [-to.pô] 制造珂罗版的程序

【引伸】
he.liotype.
v.（动词）
he.liotyp.ic