Printed on glass? or affixed to glass?

I've had a religious portrait of the Madonna on this type of format - the back folds out to make a stand. I thought it was printed on glass, and looks like this one is, too. Is there a name for that process, other than reverse printed? Thanks!

 

There seems to be a plate impression in the paper. If that is the case, I would think it unlikely that the image was printed on the glass. A plate impression does not necessarily indicate an intaglio process. An impression can be added for decorative purposes regardless of the printing technique.

 

I think maybe they're glued on (the image) and then the glasse is painted or maybe sprayed with white - there's a very thin line of glue around the print.

Thanks! it just had a gel-like look and a depth to it.

Tourist - at least I assume the Madonna was.

 

I have a Madonna and child under glass. Wonder if it's the same as yours. It was my grandmother's so I still have it up.

 

Oh, nice
I assumed the religious piece I had was done that way so it could travel, since it had a convertible stand - the image was protected, although the back was deteriorating, just like this.
There is no frame on either, just the backing.

 

Mine seems to be stuck on the front of the frame. I've never tried to figure it out. This one hung in my mother's bedroom. There was another one of the Sacred Heart of Jesus on the wall opposite her bed. When I was recovering from my smallpox vaccine I slept in her bed during the day. I was five. I vividly remember those eyes watching me. How bizarre that Catholic children grew up with images of people with bleeding hearts on the outside of their chests or saints being tortured. It's a wonder we aren't all messed up. Oh, wait. Some of us are!

 

Possibly related to the processes described in the following links? The item in the first post looks newer, though.

http://antiqueprintsblog.blogspot.com/2009/07/glass-transfer-painting.html

http://cool.conservation-us.org/coolaic/sg/bpg/annual/v21/bp21-13.pdf

http://thebookandpapergathering.org/2015/05/06/the-non-conservation-of-a-reverse-glass-print/

The book titled A Handbook of Popular Antiques by Katharine Morrison McClinton (1946) has a chapter that includes information, too. Unlike the links above, she also refers to more recent implementations of a similar process that she says look cheaper and are not made as well. The oldest ones are described as mezzotint transfers on glass. She also uses a more generic term, transfer painting on glass, to describe both older and more modern processes.

 

Very cool. Bookmarked the links.

 

Once dry, the paper could be rubbed away with the fingertip, leaving only the transferred ink of the print. (from first link)

Oddly, I recall recently seeing or reading about the removal of the paper... This is a polychrome print process with various sized dots that follow the contours of the image, like what you'd see on porcelain transfers of a certain age.