With her post, Marie talked about "the cat being out of the bag".
Here's my version!
This is a postcard from the book The Cat Postcard Book by Running Book Publishers.
The back of the card reads: Playtime, c. 1885, by Raphael Tuck and Sons (British),
Chromolithograph, Hallmark Historical Collection, Hallmark Cards, Inc.
On the very front of the card in the lower right side it reads, With Heartiest Wishes for a Merry Christmas!
"Chromolithography is a method for making multi-color prints. This type of color printing stemmed from the process of lithography, and it includes all types of lithography that are printed in color. When chromolithography is used to reproduce photographs, the term photochrom is frequently used.
Chromolithography replaced coloring prints by hand, and eventually served as a replica of a real painting. Lithographers sought to find a way to print on flat surfaces with the use of chemicals instead of relief or intaglio printing. Depending on the number of colors present, a chromolithograph could take months to produce. To make what was once referred to as a “chromo”, a lithographer – using a finished painting as a model – gradually built and corrected the print to look as much as possible like the painting in front of him, sometimes using dozens of layers.The process can be very time-consuming and cumbersome, contingent upon the skill of the lithographer."