Art glass film coating damage?

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T.J.G
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Art glass film coating damage?

Post by T.J.G »

Hi there, wonder if anyone has some advice please.

I had some AR UV 99% artglass (groglass) delivered recently. I cleaned the glass of course, however, there where quite a few gummy type specs that were hard to remove. The glass is now fitted over black mountboard. Of course black shows up everything, when I analyse the glass in the light, I can see some iridescent specs. I tried cleaning but the specs are still there. I’m wondering if I’ve damaged the film coating with the original cleaning? Any advice welcome.

Thanks Thomas
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David McCormack
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Re: Art glass film coating damage?

Post by David McCormack »

You may have damaged the coating but I would say most likely not :D

What did you use to clean the glass? I would try again with a soft micro fibre cloth and some good glass cleaner that you would use for spectacles or camera lenses. I use Opti-Bright from Wessex.

I know the sort of marks you mean, green and purple etc., as you say iridescent, but they will go when cleaned. What you are seeing is grease/dirt which is interfering with the optical effect of the coating causing the colours to show. That's as technical as I can be there :Slap: but I'm sure that's what t is.
"You know, there's a right and wrong way to do everything!"
Oliver Hardy.
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T.J.G
Posts: 17
Joined: Wed 03 Jun, 2020 9:33 pm
Location: Inverclyde
Organisation: Thomas John Gavin
Interests: Art, sailing

Re: Art glass film coating damage?

Post by T.J.G »

Thanks Oliver, I was getting a bit exasperated, loosing hope! I’m using Nilglass H3. I’ve over handled a couple of pieces I think, in and out the frame too much and managed to scratch the film slightly too! I’m not convinced with the glass cleaner I have!
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David McCormack
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Re: Art glass film coating damage?

Post by David McCormack »

Cleaning my coated filters for camera lenses is a nightmare at times and coated picture frame glass is no exception. I stopped stocking full sheets of coated glass in the end and got Wessex to cut it for me to size. The trick is to handle it as little as possible :head:

I would definitely try a different cleaner, good luck :sweating:

Cheers (Dave)!
"You know, there's a right and wrong way to do everything!"
Oliver Hardy.
https://www.instagram.com/davidaustinmccormack/
T.J.G
Posts: 17
Joined: Wed 03 Jun, 2020 9:33 pm
Location: Inverclyde
Organisation: Thomas John Gavin
Interests: Art, sailing

Re: Art glass film coating damage?

Post by T.J.G »

Thank you, I see Zeiss do a lens cleaning spray for coated glass, I might try that as I can get it next day.
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David McCormack
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Re: Art glass film coating damage?

Post by David McCormack »

Sounds good :D
"You know, there's a right and wrong way to do everything!"
Oliver Hardy.
https://www.instagram.com/davidaustinmccormack/
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