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Country Discussion Topics
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Acid
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fredo.    Posted 11-10-2003 at 11:01:07       [Reply]  [Send Email]
ok anyone. what is the name of the acid you keep in wax and you use it to etch glass? ben a long time since i learned about it in school.
thanks,
fredo.


ErnieD    Posted 11-11-2003 at 17:00:49       [Reply]  [No Email]
HF etches glass. It is a bone seeker, will penetrate the skin with little damage and burn the bone. My chemistry teacher in HS got burned in a bad way and he was trying to be careful. Did not notice until the next day.

Etch your glass by sand blasting and use the proper respiratory protection.


RayP(MI)    Posted 11-10-2003 at 19:38:25       [Reply]  [No Email]
If you are looking to etch glass, there is a product caller Armour Etch, available at many craft stores that does a great job, and is far safer than HFl acid! My wife uses this with her 4-H crafters.


john    Posted 12-17-2005 at 20:55:15       [Reply]  [Send Email]
hi, i am an art student, and bought the armour etch cream for an
asighnment i have. i was wondering, is there any way to dilute the
armour etch cream so that i can make it thinner?


Hal/WA    Posted 11-10-2003 at 18:29:19       [Reply]  [No Email]
Thinking back to college chemistry, which I had a looooong time ago, Aqua Regia was a mixture of nitric acid and another acid (HCl or H2SO4 ?) that was supposed to etch glass. We mixed it up and used it to clean deposits from laboratory glassware that we couldn't remove any other way.

I never worked with hydrofloric acid, but it may be the one you want. I think I remember hearing that it would etch glass. It was not among the acids that we had generally available in the lab.

All of the concentrated acids are dangerous. Best quality eye protection needed all the time; should have a fume hood to remove bad vapors; an eyewash and decontamination shower should be very close by; and care must be taken when diluting or mixing the acids--some can explode if the conditions are right.

And clothing can disintegrate in seconds if some of the acids are splashed on them. I saw this happen in a lab accident. Luckily the girl that got splashed had her goggles on and was not badly burned because we pushed her into the shower immediately and washed her down. It only embarrassed her because the whole front of her shirt disappeared in an instant. But the acid did etch a couple of her front teeth. WAY SCARY! If the acid had got to her eyes, we would have had to save them in the eyewash and undoubtedly her body would have been much more injured...... If you don't know what your are doing with the strong acids, get some competant instruction before you purchase the acid. Very dangerous if you handle it wrong or make a mistake!



fredo.    Posted 11-10-2003 at 18:08:15       [Reply]  [Send Email]
thanks fellows. this came up in a scrabble game. i had my chem. class in 1947. i still remember nacl is table salt. thanks again.
fredo.


big fred    Posted 11-10-2003 at 14:49:43       [Reply]  [No Email]
Hydroflouric will certainly etch glass, of course it will etch you too. Be very careful around it if you are planning on etching some glass. It is not only corrosive as all get-out, it is also absorbed thru the skin quite readily, even if it's fairly dilute.


screaminghollow    Posted 11-11-2003 at 06:40:17       [Reply]  [No Email]
Watch that Hydrofloric acid, once represented a fella who worked in a chemical plant. An acid pump flew apart and sprayed hyrdofloric acid all over him. He had a Face shield and respirator on, but it got his ears, neck and arms real bad. They hosed him down with baking soda water within seconds but someof it still got into his skin and flesh.. The stuff keeps eating away for weeks. He needed a couple of years of treatment and plastic surgery etc. I wouldn't have the stuff around under any circumstances.


Les    Posted 11-10-2003 at 11:25:13       [Reply]  [No Email]
I think that would be hydrofluoric acid. (HFl)


Kane Kounty Ken    Posted 11-15-2003 at 07:17:37       [Reply]  [No Email]
Hydrofluoric acid is used in a wr grace product that turns asbestos spray-on fireproofing into a glasslike! HF is the only chemical that changes asbestos's composition.



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