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Q: Telling the age of my antique mirror? ( No Answer,   1 Comment )
Subject: Telling the age of my antique mirror?
Category: Miscellaneous
Asked by: cccrash1316-ga
List Price: $10.00
Posted: 16 Oct 2002 22:06 PDT
Expires: 03 Dec 2002 08:29 PST
Question ID: 77584
I would like to know if there is a way to find out how old my antique mirror is?

Request for Question Clarification by justaskscott-ga on 16 Oct 2002 22:25 PDT
In what town or city do you live?  Perhaps a researcher can locate an
antique mirror expert in your area.

Request for Question Clarification by kriswrite-ga on 17 Oct 2002 11:07 PDT
Can you include a link to a picture of the mirror? Preferably with
detail shots of the frame and the back.

Clarification of Question by cccrash1316-ga on 18 Oct 2002 20:33 PDT
Scott, I live in Modetso,Ca... I had someone tell me that if U hold a
lit candle
up to the mirror, the reflection U see,if U see more than one
reflection that the number of reflections U see will tell U how old
the mirror is. but the person didn't remember how many years each
reflection mere. Have U ever heard anything like this or where I could
get more info about the candle & mirror age test

Request for Question Clarification by feilong-ga on 10 Nov 2002 10:41 PST
I have a question for you cccrash1316-ga: can you tell us how thick is
the glass of your mirror (without the frame or any backing material)?

Clarification of Question by cccrash1316-ga on 10 Nov 2002 21:46 PST
Re: feilong-ga,
    Yes I can tell U how thick the glass is. Let me get out my calipers,
The glass is .231 thousands thick.

Request for Question Clarification by feilong-ga on 10 Nov 2002 22:57 PST

You forgot to specify the unit of measure you used (.231 of ______
thick). I have some other questions though:

1) Is your mirror a hand mirror or a mirror that can be stored/placed
flat or is it a vertical mirror, i.e. the type that is vertically
mounted on walls, cabinets, lockers, etc.?
2) Is the measurement .231 exactly the same along the edge of the
3)If possible, can you measure the thickness from the near the or
exact center of the mirror?

The accurate answers to these 3 questions can be helpful in
determining the age of glass. Let's be clear on the fact that your
mirror is made of glass. Why did I ask these questions? Glass is not
purely solid although it seems like it. Glass also has the property of
a liquid in that it flows (although this happens very very slowly over
time). One can see that on very old vertically mounted mirrors the
central part is thinner than the bottom part. Another thing is the
amount of distortion in the appearance of the image on the glass
caused by the flow.

There are many materials that possess dual material properties.
Another good example is mercury - the  silvery gray material found
inside thermometers. If you've seen the Arnold's liquid metal cyborg
nemesis in the movie "Terminator 2", that is how mercury appears.

I took the info above regarding glass from what I learned in physics
and chemistry class during my school days. I did not post this as an
answer because you might require me to give you an exact formula on
this. If I find one, I will. If you find this helpful enough and
you're satisfied with it, please verify so that I can repost this as
an answer complete with additional info and links. I hope this helps.

I'm just curious: why do you want to know the age of your mirror?
There is no answer at this time.

Subject: Re: Telling the age of my antique mirror?
From: kriswrite-ga on 08 Nov 2002 13:23 PST
The "test" you mention is folklore; it can't really tell you the age
of a mirror. If you include a link to a photo of the mirror, along
with detail shots of any labels, the back, etc., someone here may be
able to date it for you. Otherwise, one of the researchers can
probably point you in the direction of an antiques expert in your

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