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My makerspace is in Troy, NY. It is the Tech Valley Center of Gravity. The classes I do are for the makerspace although we did do glass engraving at our booth at the NYC World Maker Faire the year before last.
It is possible but would have the following issues:1 - You need a waterproof way to get one side of the cooler exchanging heat with the water and the other side open to the air2 - Peltier coolers use a lot of power. This would need a large power source or be plugged in.3 - The amount of cool = the amount of heat generated so for the amount you cool the water, you dump that much heat out the heat sink - near you.The total amount of cooling could be increased by:1 - Maximizing the amount of water (bigger thermos, filled higher)2 - Making the water colder - Maybe add salt while in the freezer?3 - Use dry ice in the water?4 - Use a block of ice - maybe freeze it with the coil in it and then add some water prior to use so there is water to pump around?I haven't tried any of these.
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Thanks. The swishing isn't necessary but when you are trying to get an even etch over an area, it helps bring fresh etchant to the surface.
Just be very careful not to smear any of the cream on unprotected glass, even for less than a minute. I have definitely had dots, blots and drools mess up otherwise fine glasses. I'm glad you had success - thanks for sharing the image.
I suspect that would be best on deep carving of the glass. For surface engraving, I would be concerned that the lines would be harder to see. I will give it a try - always interested in expanding what I know. Thanks.
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