The Collaborative International Dictionary
Ivorytype
Ivorytype \I"vo*ry*type`\, n. (Photog.)
A picture produced by superposing a very light print,
rendered translucent by varnish, and tinted upon the back,
upon a stronger print, so as to give the effect of a
photograph in natural colors; -- called also hellenotype.
--Knight.
Wiktionary
ivorytype
n. (context photography dated English) A picture produced by superpose a tinted translucent print upon a stronger print, so as to give the effect of a photograph in natural colours.