I learned the Reverse Glass Technique, a long time ago, from my Mom who loved to paint.
I believe, when did the reverse glass technique, she used Acrylic Paint on her painting.
For mine, I’m using Decocolor Markers from Marvy Uchida.
I use these paint markers all the time on a variety of surfaces.
First thing you’ll want to do is to pick out the image.
For me, the simpler the better.
I picked a free graphic from Coloring Hub. (link below)
1. Lay Clip Art under glass and trace around image with black Decocolor marker.
2. Use ruler for outside areas to get those lines straight. Make sure to leave time for the ink to dry before laying ruler on top the previous line.
Here is the design outlined. I like using the fine point marker better than the extra fine marker.
3. Flip the glass over and do your coloring on the reverse side of the glass. Make sure to color all the way to the edge of the lines.
4. Color in the remaining sections. Make sure to get the colors as close as possible. Here is the back of the glass with the full design colored in.
Marvy Uchida also makes this Decocolor Remover which I absolutely love. It has saved me on more than one occasion. It works wonderful to correct any mistakes you make. I recommend you pick one of those up also. (FYI: it also removes alcohol ink from non porous surfaces)
Here’s some interesting history on Reversed Glass Painting. (it’s been around for a long time)
Here’s another possible way to do a background. (a more updated version)
Color/Paint only a portion of the image and leave the rest unfinished.
Add a piece of scrapbook paper to the back of the glass before framing.