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Old 11-07-2017, 01:15 PM
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Condensation in ornaments

I was asked to make 200 clear ornaments for a glass engraver. I was happy with the sample I sent, and it sat on his doorstep for a couple hours. When he took it inside he said he noticed condensation inside the ornament. I used a blowhose. Anyone think they know whats going on here?
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Old 11-07-2017, 02:02 PM
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Out of the past:

http://talk.craftweb.com/showthread.php?t=9764
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Old 11-07-2017, 03:24 PM
Eben Horton Eben Horton is offline
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When you stick your blob on the hole to make the loop, stick 1 part of a pair of surgical tweezers over the hole and push the glass down and then pull up and cut the glass. You will get a vent which will allow the ornament to breathe and not trap condensed water in there.
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Old 11-08-2017, 08:45 AM
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Wouldn't the hole mess with athestics? Or can you get slick enough at that move that it looks good?
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Old 11-08-2017, 11:22 AM
Eben Horton Eben Horton is offline
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It looks fine
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Old 11-09-2017, 03:55 PM
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Maybe using the smallest diameter tungston drill bit you could find could achieve the same results with a smaller hole....?
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Old 11-09-2017, 04:18 PM
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I would suspect that not using a pipe warmer would help a lot. Water is a by product of combustion after all.
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Old 11-10-2017, 08:02 PM
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I would suggest that the condensation is not as folks are suggesting, the result of no opening with trapped moisture, but the opposite. The hot, blown ornament, camped in your knock-off can waiting for you to bring the hook bit has more than enough heat to drive off any moisture in the internal atmosphere. The hook bit has to completely plug the opening to trap this dry air and seal out any possibility of condensation in the future.

I can speak from experience since I have probably made more ornaments in my career than any other single item. I have never had anyone, including myself, see moisture condensing on the inside of one of my ornaments, unless of course I left a hole so moist air can find a way in.
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Old 11-10-2017, 08:40 PM
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Quote:
Originally Posted by Pete VanderLaan View Post
I would suspect that not using a pipe warmer would help a lot. Water is a by product of combustion after all.
I have found that using a pipe warmer will create a draw effect into the pipe that can be blocked by the use of golf tees plugging the openings. Without this plug, on humid days the draw through the pipe of humid air will cause condensation inside the pipe walls, leading to stupidly hot pipes if you don't take care to blow like hell to clear the moisture.

But I don't think that the moisture content of air inflating an ornament is what is resulting in condensation inside the ornament. (See my earlier post).
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Old 11-13-2017, 10:42 AM
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There is another source for it which would properly be called "Soda Bloom" and that comes from a glass body that isn't really as stable as it should be. The glass has a tendency to look fogged and somewhat dull.
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Old 11-15-2017, 03:04 PM
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Well this is getting beyond mysterious. I'm getting literal dew drops inside these things
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Old 11-15-2017, 03:30 PM
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and that would be far more characteristic of a soda bloom. Stuff coming out of the glass itself due to violation of essential rules in making quality goop ( a technical term). Also known as a super-cooled liquid. The lower end of the spectrum line, sys96 has always been suspect. Everyone wants their goop to melt at very low temperatures. There are extractive costs for doing that.

Then again maybe it's just spit.
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Old 11-15-2017, 05:25 PM
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I've been making ornaments here in the rainforest of Florida for many years and have never experienced this phenomenon. Is it possible your waiting to long to cap the ornament and as the tempature drops the ornament is sucking in moist air from the atmosphere?

I've made blanks for engraving similar to what you describe and several are hanging on the trail in the woods going to my house. They are clear as can be on the inside.

I would be frustrated to say the least.
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Old 11-15-2017, 08:41 PM
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I agree with Sky.... I have been blowing ornaments in the swampy-humidity of New Orleans since forever.... I have never had a condensation problem inside ornaments and have never done the wire trick.
Why wouldn't any water vapor evaporate by the heat of the glass? It can't be coming from your breath... science is hard!!!!!
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Old 11-15-2017, 08:47 PM
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I'm not talking condensation.
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Old 11-15-2017, 08:50 PM
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Quote:
Originally Posted by Pete VanderLaan View Post
I'm not talking condensation.
That is what this thread started with.......
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Old 11-15-2017, 09:14 PM
Lawrence Duckworth Lawrence Duckworth is offline
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Break one and taste the “condensation”
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Old 11-16-2017, 08:46 AM
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Quote:
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Break one and taste the “condensation”
excellent observation. Or put the stuff in some litmus paper.
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Old 11-16-2017, 08:47 AM
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Quote:
Originally Posted by Mark Rosenbaum View Post
That is what this thread started with.......
I'm saying it may be sodium, not water
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Old 11-16-2017, 02:50 PM
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Quote:
Originally Posted by Pete VanderLaan View Post
and that would be far more characteristic of a soda bloom. Stuff coming out of the glass itself due to violation of essential rules in making quality goop ( a technical term). Also known as a super-cooled liquid. The lower end of the spectrum line, sys96 has always been suspect. Everyone wants their goop to melt at very low temperatures. There are extractive costs for doing that.

Then again maybe it's just spit.

It is system 96.....

As to rainforest blowing, sounds awesome, and yeah, i've been driving people crazy here closing windows and doors to keep the RH in here low. Maybe its all for naught

Last edited by Miles Koester; 11-17-2017 at 11:24 AM.
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Old 11-16-2017, 03:52 PM
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Quote:
Originally Posted by Pete VanderLaan View Post
I'm saying it may be sodium, not water
*******
Think sodium silicate, also known as water glass. Litmus paper would confirm the nature of the material.

I view it as highly unlikely, really but I don't discount anything with glass. When I was a kid, I melted Dudley's original formula which had about 24 % sodium in it and melted if you spoke hot and angry words at it. I made these pieces for my mom at the time and she had them on wooden shelves. The glass was in fact quite unstable and destroyed the wooden surface. Being a mom, she put the piece in plastic bags where they gradually began to decompose.
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Old 11-16-2017, 11:18 PM
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I have been making c-balls for 30+ years.. never seen that happen..
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