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Painting on glass blocks

by Kathy
(pavilion ny)

I painted a design by Renee Mullins on an 8 in glass block. It looked great til I put the lights in and turned them on. The painting shows the unevenness of the paint because it is not ompletely opaque. Streaking and darker spots where shading was done. What am I doing wrong? I used Americana paints. Is there something I can add to the paint. I did etch the glass first. Appreciate any help you or anyone can provide.

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Mar 14, 2015
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Painted Glass Block
by: Cheryl

Hi Kathy, I decided to ask Renee Mullins herself. She graciously responded with the following.

"Hi Cheryl.... After you frost or etch the glass, transfer the outline of the design you will be painting. You will need to undercoat the entire area with black gesso or I couldn't find black gesso so I used white and added black to make a dark grey. Block this area in ( undercoat) until opaque. You do not want to see any light come through the area you are going to be painting.

A good way to check is to put the lights in the block and turn them on. If you can see brushstrokes in the undercoat you will need another coat. What this does is block out any light in the area you will be painting, therefore you will not see any brush strokes from your painting.

I have the instructions for undercoating in my pattern packet...."

So Kathy, perhaps you didn't read all the way through her detailed instructions. Anyway, I do hope this has been helpful.

Mar 14, 2015
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Painting on glass blocks
by: Kathy

Cheryl
Thanks for the information about using gesso before painting on the glass. The pattern (Renee Mullins) that I used was not on glass and I didn't know until now that she had a pattern packet for the glass blocks, so I had no way of knowing.

Thanks again for your quick reply.

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