glass cement - what is it ?
The cement used to fix the UV filter glass discs to the front of dichroic
lamps etc, so high temperatures. It is clear , maybe a silicone type material. -- Diverse Devices, Southampton, England electronic hints and repair briefs , schematics/manuals list on http://home.graffiti.net/diverse:graffiti.net/ |
glass cement - what is it ?
"N_Cook" wrote in
: The cement used to fix the UV filter glass discs to the front of dichroic lamps etc, so high temperatures. It is clear , maybe a silicone type material. -- Diverse Devices, Southampton, England electronic hints and repair briefs , schematics/manuals list on http://home.graffiti.net/diverse:graffiti.net/ Probably a UV-curing cyanoacrylate,or it could be an optical epoxy. Edmund Scientific (edsci.com) has UV curing optical glues.(not cheap) -- Jim Yanik jyanik at kua.net |
glass cement - what is it ?
"N_Cook" wrote in message ... The cement used to fix the UV filter glass discs to the front of dichroic lamps etc, so high temperatures. It is clear , maybe a silicone type material. -- Diverse Devices, Southampton, England electronic hints and repair briefs , schematics/manuals list on http://home.graffiti.net/diverse:graffiti.net/ http://www.infoplease.com/ce6/sci/A0851590.html |
glass cement - what is it ?
Charles wrote in message
... "N_Cook" wrote in message ... The cement used to fix the UV filter glass discs to the front of dichroic lamps etc, so high temperatures. It is clear , maybe a silicone type material. -- Diverse Devices, Southampton, England electronic hints and repair briefs , schematics/manuals list on http://home.graffiti.net/diverse:graffiti.net/ http://www.infoplease.com/ce6/sci/A0851590.html I think you're right. I'd forgotten about waterglass. Once you make a purchase under the lamp cover disc it comes away fairly easily. I did not realise that waterglass can tolerate such high temperatures - even a major non-sand component of foundry casting sand even. I'd forgotten I used it a long time ago to stick a glass patch over a bullet hole in a sheet of window glass, otherwise I've just used for disguising scratches on 'scope CRT screens. Incidently there must be some medical use for it as I got a pint of it from a dispensing chemist. -- Diverse Devices, Southampton, England electronic hints and repair briefs , schematics/manuals list on http://home.graffiti.net/diverse:graffiti.net/ |
glass cement - what is it ?
On Dec 15, 12:24*am, "N_Cook" wrote:
[about filter plate on high intensity lights] I think you're right. I'd forgotten about waterglass. Once you make a purchase under the lamp cover disc it comes away fairly easily. I did not realise that waterglass can tolerate such high temperatures - Isn't waterglass brittle and corrosive (etching the glass as it adheres)? I think a flexible high temperature adhesive like RTV silicone is a better prospect, and more likely. Dichroic reflectors and UV or 'heat absorbing' glass are typically used on projector lamps which get quite hot, the thermal cycling would fracture a hard adhesive. |
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