Find's Treasure Forums
Welcome to Find's Treasure Forums, Guests!
You are viewing this forums as a guest which limits you to read only status.
Only registered members may post stories, questions, classifieds, reply to other posts, contact other members using built in messaging and use many other features found on these forums.
Why not register and join us today? It's free! (We don't share your email addresses with anyone.) We keep email addresses of our users to protect them and others from bad people posting things they shouldn't.
Click here to register!
Need Support Help?
Cannot log in?, click here to have new password emailed to you
Changed email? Forgot to update your account with new email address? Need assistance with something else?, click here to go to Find's Support Form and fill out the form.
Why does glass sound like metal?
- Thread starter kanaka2
- Start date
G. E. Edwards
New member
I've never heard of metal being added to glass. Have you done a air test to see if it still sounds off. If it doesn't your sens. might be to high or there's a piece of metal under the glass or somewhere near. Or you just need to stay out of the bars till after you metal detect, Lol
banditicey
New member
Actually there is some metal used with some glass and especially with older and thicker glass
But I will have to pay more attention because although I find glass there is usually something metalic in the hole also
HH and Regards
But I will have to pay more attention because although I find glass there is usually something metalic in the hole also
HH and Regards
Dwayne2010
Member
I kind of wonder if the glass you found was stained glass? Held together with lead?
Back in 1979 I was searching a new site giving up coins quite regularly.
An ordinary signal that sounded "just like the other coins" turned up an old gin bottle at about a foot depth, green with that 'aged color spectrum effect'.
It was the lead used in the manufacture that created the by-now famous 'halo effect' we all talk about that led to its discovery.
It has happened a few times since, but in 37 years detecting is a rare occurrence.
Good Hunting
Des D
An ordinary signal that sounded "just like the other coins" turned up an old gin bottle at about a foot depth, green with that 'aged color spectrum effect'.
It was the lead used in the manufacture that created the by-now famous 'halo effect' we all talk about that led to its discovery.
It has happened a few times since, but in 37 years detecting is a rare occurrence.
Good Hunting
Des D
G. E. Edwards
New member
Very interesting, didn't know they used lead in glass way back when. That explains why people didn't live long in those days.
glasartisan
Member
There is a slight chance that it could be possible. The pontil mark or correctly called the improved pontil or iron pontil on the very bottom of the bottle has iron in it. This pontil scar was part of the manufacturing process left on the bottle. The pontil rod or punty was coated in iron oxide before the rod was adhered to the bottom of the bottle while the glass was still shapeable. The very top of the bottle could now be tooled while the base was held by the punty. When finished the rod was separated from the bottle and the iron oxide was permanately transferred to the base of the bottle leaving the iron oxide scar behind. This process was in effect from 1840s to about the end of the civil war. Steve
"Well explained Steve and, sounds very accurate too"
As far as I can remember back to when it happened the first time, when the bottle was dug up and was NOT a piece of metal this surprised me greatly and I just couldn't fathom what was going on?
But, as my then detecting experience was just two years I concluded that [ this must be a normal occurrence ]
It never reoccured for many years until one day I was searching underneath a hedgerow at an abandoned home when it happened again, this time on a smaller bottle, with an also curved bottom.
A very nice thin round with a gentle curvature where it was intended to lay on it's side?
The gin bottle found in 1979 had been larger than a current wine bottle size seen in any grocery or liquor store ( depending on which State you live in )
Once removed from the soil there was no longer < a signal > the 'classic halo effect'
Then, again many years later during early E Trac prototype testing a colleague and I unearthed a large and empty glass jar at a riverside location probably brought along by a fisherman once containing bait we were both amazed by this but once completely removed from the ground we then saw its metal lid was intact and thet explained the very good signal.
I still have video of this event.
Good Hunting
Des D
As far as I can remember back to when it happened the first time, when the bottle was dug up and was NOT a piece of metal this surprised me greatly and I just couldn't fathom what was going on?
But, as my then detecting experience was just two years I concluded that [ this must be a normal occurrence ]
It never reoccured for many years until one day I was searching underneath a hedgerow at an abandoned home when it happened again, this time on a smaller bottle, with an also curved bottom.
A very nice thin round with a gentle curvature where it was intended to lay on it's side?
The gin bottle found in 1979 had been larger than a current wine bottle size seen in any grocery or liquor store ( depending on which State you live in )
Once removed from the soil there was no longer < a signal > the 'classic halo effect'
Then, again many years later during early E Trac prototype testing a colleague and I unearthed a large and empty glass jar at a riverside location probably brought along by a fisherman once containing bait we were both amazed by this but once completely removed from the ground we then saw its metal lid was intact and thet explained the very good signal.
I still have video of this event.
Good Hunting
Des D