metal on glass for reflectors.

[Søren Momsen]

hello,

i like to know the english therm of the process when you put metal in a thin
layer on glass.
in Denmark its called Lystre

there is properly a lot of ways to do it these is the ones i know:

1) steamed metal on glass (dicroic) as on mirror sunglasses and skyscraber
windows thin folio from 3M

2) paintet platin directley on the glass therafter in the oven at 500
degrees and then polish til its like a mirror.

3) as in thermo coffee cans inside layer.. i dont know the process.

4) glass with a lot of lead in . but its poisinos..


please tell me more ways because i like to use it in a reflector on a lamp

best regards
Soren Momsen
www.momsendesign.com

 

[Ian Stirling]

hello,

i like to know the english therm of the process when you put metal in a thin
layer on glass.
in Denmark its called Lystre

Silvering?
Ask over on sci.astro.amateur for kits to do this onto glass.

there is properly a lot of ways to do it these is the ones i know:

1) steamed metal on glass (dicroic) as on mirror sunglasses and skyscraber
windows thin folio from 3M

Steam is boiled water.
I think you mean evaporated metal.

2) paintet platin directley on the glass therafter in the oven at 500
degrees and then polish til its like a mirror.

3) as in thermo coffee cans inside layer.. i dont know the process.

Google for sputtering.

4) glass with a lot of lead in . but its poisinos..

This is not reflective, but clear.

 

[Jeff Lowe]

hello,

i like to know the english therm of the process when you put metal in a thin
layer on glass.
in Denmark its called Lystre

there is properly a lot of ways to do it these is the ones i know:

1) steamed metal on glass (dicroic) as on mirror sunglasses and skyscraber
windows thin folio from 3M

2) paintet platin directley on the glass therafter in the oven at 500
degrees and then polish til its like a mirror.

3) as in thermo coffee cans inside layer.. i dont know the process.

4) glass with a lot of lead in . but its poisinos..

Take a look at the Brashear process for silvering:
http://www.ecu.edu/chem/glassblowing/Data.htm
Jeff, ATM

 

[Jeff Lowe]

Take a look at the Brashear process for silvering:
http://www.ecu.edu/chem/glassblowing/Data.htm
Jeff, ATM

I felt I should follow this up a bit. The Brashear process will plate silver
on a surface and is how the mirror makers of old got their reflective
surfaces. This surface, being pure silver, will tarnish with time. Most
mirror makers today use vacuum deposition of aluminum. Some firms in the US
which perform this are : Denton Vacuum, PA Clausing, Research Services, and
many others.

WARNING! WARNING! WARNING!
The Brashear process can produce silver fulminate (a contact explosive) if
extreme care is not observed in all steps. It is your responsibility to
research this carefully and consult with appropriate experts in order to
avoid blowing yourself up.

 

[Søren Momsen]

Dear Jeff,

thank you for the remarks.
espacialy the explocive one

i will use this reflective materials for some lamps i like to design.

regards
Soren Momsen
www.momsendesign.com

 

[Bart Z. Lederman]

There are a number of other methods of chemically depositing
silver on glass that are newer and probably safer than Brashear's.

As a previous person noted, the astronomy groups (or any good book
on amateur telescope making) will give instructions.

Silver isn't the only metal one can deposit on glass. There
are formulas for depositing copper, and for the dark blue
mirrors one used to see in furniture and one Candy store
chain. That is a lead compound, so most people probably
won't want to try it.

As others have mentioned, there is plasma and vaccuum deposition,
but those methods require specialized equipment.

--
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