bubbles in reverse painted black

[Roderick Treece]

Wondered if anyone else has had this problem. I know Dan had an issue with mixing size but this is just straight one shot black.
I started with clear 1/4" glass. Cleaned it with distilled water and Bonami.Let it dry and bluffed it clean. applied a mask and rolled on black one shot with a few drops of hardner. Did not need thinning. Pulled the mask and let it dry over night. Totally dry the next day so I water gilded the lettering with 23.7 gold leaf.Backed the lettering up. Came back a few hours later and notice a few small air bubbles in the paint that show from the front. Never had this happen before. Your help is appreciated thanks

[Tyler Tim]

Roderick... I believe it's the curse of using the Original One Shot. The New formula just does not act the same. So it could be although it appeared dry it was not cured fulling. The size and leaf sealed and bonded to the paint better so the slight bit of off-gassing then migrated between the glass and paint. Wait are you talking about a black outline or you blacked out the panel? Either way is it behind area of leaf that it occurred?

[Roderick Treece]

Hi Tyler,
This is a black panel that was painted using a mask. Black ground with water gilded letters. The bubbling is where the gold is laying so yes it must be a reaction from the paint to the gold sealing it up.I've been doing the same process for years with no adverse reactions before.

[Bryce Hutchinson]

Hi Roderick, I have lost my faith in 1 shot. I never know when, or if, it is dry. 1st bad experience, but not the only one, was laying down 1 shot on precision board, I thought I had let it dry, then put on a sandblast mask, when I pulled the mask, off came sections of the 1 shot. Has anyone used urethanes with success? They dry super fast, but catalyst can slow them down. I know some stripers are converting to House of Color or Dupont Hot Colors.

[Kevin W Betz]

Can you post a Picture ?

Also, you said you rolled the Black on.
When rolling Paint, there is Always small
pockets that are not filled. That is where
Feathering the paint helps. Feathering
with a Brush helps to Eliminate pockets of Air.

kb

[Dan Seese]

Rod,
I'm a little confused since in your initial post you said the bubbles are in the paint but later you clarify that it's in the gold and not the paint. So am I correct in assuming that there are NO bubbles strictly where the black paint shows but ONLY where you've water gilded and backed it up?
If that's the case, there might be a chance that there was moisture trapped by the back up paint which created bubbles as the moisture tried to escape.
Wish I could nail things down and not always be learning the hard way.

[Roderick Treece]

24" x 30" x 1/4" clear glass panel. Black background painted using a spray mask. One shot black w/ gardner. Rolled on with a foam roller then brushed over to knock down bubbles. Let it dry 1/2 an hour then pulled the mask for the text. Let it dry over night. Water gilded the text. It was prefect until about four hours later when it started to bubble in the black area where the gold was. It continued to bubble for another day and has now stopped. No bubbling in the water gilding at all.

I am already planning to move to urethane paint with a catalyst. Also testing "Glass Paint" primer for water gilding. It makes the paint stick like it's fired on the glass.

[Dan Seese]

So, I'm still trying to understand.
You say, ". . . it started to bubble in the black area where the gold was." and then you say, "No bubbling in the water gilding at all."
So is it bubbling where the gold overlapped onto the back of the black but it's not bubbling in where it's water-gilded directly to the glass? It's not clear exactly where the problem lies.