Paint for glass

[marcellar]

Hi there,

I have been doing some fustrating research on the internet trying to find a paint that will withstand all sorts of abuse, when the surface being painted is glass.

It needs to withstand caustic and acidic automated washing environments as well as temps up to at least 121°C. I don't think there will be much physical abrasion. It just needs to mark and identify certain items so we can keep track of them.

I'd prefer ease of application, as I would have to repeat the paint numerous times on new glass pieces. This I think sort of eliminates the 2 pack process as once it is mixed, it needs to be used up and is rather nasty health wise, from my understanding of it.

I hope that someone here might be able to help me find some paint (or other coating) that might fit this bill.

Thanks in advance!
Marcella.

 

[alexit]

Maybe look at etchants, some will cause distinct coloring in their interaction with the glass...of course most etchants for glass are not healthy in long term exposure either.

 

[IRstuff]

I would argue for sandblasted or etched markings, either on the surface or on an edge.

There may be other benefits to having permanent markings on your product for product tracking and defect tracking

TTFN

 

[marcellar]

Thanks for the feedback,

I was hoping for something with color so that I can spot it "generally" instead of having to examine it close up.

For the close up mark I can etch a small symbol, but was hoping for something durable I could identify from further away.

If I used a plain enamel spray paint and scratched up the glass surface a little, do you think it would stick for a decent amount of time or do you think it would give up and come off rather soon?

 

[btrueblood]

Have you tried the usual permanent ink markers, and paint pens used in steel yards? Your next best bet is an epoxy paint, especially the kind that requires a heat cure. Yes, etching or abrading the surface will improve adhesion. You may want to look into low-temperature glazes (as used in pottery).

 

[marcellar]

Good ideas!

Thanks a lot Btrueblood. I will look into your suggestions.

Cheers!

 

[berkshire]

I realise this posting may be a little late, but try

http://www.pebeo.com/us/

if you have not solved your problem.
B.E.