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Zombie
Forum Hillbilly
Posts: 1700
Registered: 13-1-2015
Location: Florida PanHandle
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Mood: I just don't know...
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Fiberglass is my "thing"
You can stripe out a square on the table using double sided tape, and stick the cloth to that. This will hold it "true" so you can then use painters
tape on the top side to mask off a clean line for your silicone edging.
Let that side cure, and then flip it over, and do the reverse.
Keeping the cloth square while you work will get rid of all the issues.
I'm going to have to make a few of those when I get the chance. I really like the idea
They tried to have me "put to sleep" so I came back to return the favor.
Zom.
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Loptr
International Hazard
Posts: 1347
Registered: 20-5-2014
Location: USA
Member Is Offline
Mood: Grateful
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Quote: Originally posted by Zombie  | Fiberglass is my "thing"
You can stripe out a square on the table using double sided tape, and stick the cloth to that. This will hold it "true" so you can then use painters
tape on the top side to mask off a clean line for your silicone edging.
Let that side cure, and then flip it over, and do the reverse.
Keeping the cloth square while you work will get rid of all the issues.
I'm going to have to make a few of those when I get the chance. I really like the idea |
That is a good idea. I really wish the silicone could be painted on, rather than having to be smeared, since that is where most of my problems came
from. This is where my idea of using a volatile solvent to add to a pool of RTV silicone came from, since I figured it would be easier to dip or paint
the edges.
I will be making several more of these in various sizes, and will probably try a couple of different techniques. The use of the painters tape to mask
the edges is a really good idea.
Thank you, Zombie.
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The Volatile Chemist
International Hazard
Posts: 1981
Registered: 22-3-2014
Location: 'Stil' in the lab...
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Mood: Copious
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| Quote: Originally posted by violet sin | @The Volatile Chemist: yes, I made it so I could use a voltage tripler scavenged from an old tv, with my oil burner transformer. The OBT is
centertapped secondary providing AC, the trippler was working @ 1/2 effency at best. Seemed like less. The neg side feeding *into the tripled is
also the neg side return of the higher voltage it produces. BIG angry constant arc now instead of a repeating arc from AC as it was. All used for
learning and notes on NO2 production. The OBT was More than capable of making an orange cloud in a mason jar in a few sec with platinum electrodes.
Tantalum, though high temp resistant, wasn't doing near the same work. Magnets were used to make a disc arc finally. Way down the road I wanted to
have it all run on a small solar panel in my back yard for free. Just have to build the frame and start soldering there. Maybe the +100'F summers
will be providing HNO3 if I get some more time to work it. Controller, tabbing, 12v batts etc. On hand, time not so much.
@Zombie: thanks, it was a rewarding project. |
Cool. Any particular reason you enclosed it that way? (the Bridge).
You're oil burner transformer reminded me of mineral oil cooled computers, though totally unrelated. Anyone tried one of these?
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violet sin
International Hazard
Posts: 1475
Registered: 2-9-2012
Location: Daydreaming of uraninite...
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Mood: Good
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stupid compy dumped my comment twice now after having written several paragraphs each time. using the lap top with out a mouse can be a pain.... ya
PVC is cheap, durable, machinable and available... coulda used epoxy.
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Zombie
Forum Hillbilly
Posts: 1700
Registered: 13-1-2015
Location: Florida PanHandle
Member Is Offline
Mood: I just don't know...
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| Quote: Originally posted by Loptr | | Quote: Originally posted by Zombie | Fiberglass is my "thing"
You can stripe out a square on the table using double sided tape, and stick the cloth to that. This will hold it "true" so you can then use painters
tape on the top side to mask off a clean line for your silicone edging.
Let that side cure, and then flip it over, and do the reverse.
Keeping the cloth square while you work will get rid of all the issues.
I'm going to have to make a few of those when I get the chance. I really like the idea |
That is a good idea. I really wish the silicone could be painted on, rather than having to be smeared, since that is where most of my problems came
from. This is where my idea of using a volatile solvent to add to a pool of RTV silicone came from, since I figured it would be easier to dip or paint
the edges.
I will be making several more of these in various sizes, and will probably try a couple of different techniques. The use of the painters tape to mask
the edges is a really good idea.
Thank you, Zombie. |
There are several versions of liquid silicone available. Most are 2 part mixes.
We use them in the marine industry to coat propellers on large yachts to prevent marine growth such as barnacles, algae, slime, oysters mussels,
ect...
http://www.amazon.com/QSil-Clear-Liquid-Silicone-2-Part/dp/B...
They tried to have me "put to sleep" so I came back to return the favor.
Zom.
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ave369
Eastern European Lady of Mad Science
Posts: 596
Registered: 8-7-2015
Location: No Location
Member Is Offline
Mood: No Mood
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My go-to source of improptu test tubes is a Chinese brand of street thermometers which is freely sold in my town. These thermometers are encased in
glass containers that, essentially, are test tubes.
Drugstore bottles are another source of glassware I use. Especially the fanfura vials. "Fanfura" is a cheap, over-the-counter form of ethanol or
ethanol-based tinctures which are sold in my country with no questions asked. They are, in fact, vodka concentrate sold to the population without
paying the vodka tax. I'm no stranger to using the fanfura for its intended purpose, as a recreational beverage, but the vials and jars in which it is
sold are perfectly good containers for chemicals.
Another easily repurposable container is the plastic bottle in which lamp kerosene is sold in my region. It is the best container for strong mineral
acids or alkaline solutions. It could be even used to store hydrofluoric acid, if it wasn't in my category of "stuff I'll never work with".
A small electric stove is a good substitute for a hotplate. The traditional Russian brick wood stove is surprisingly easy to repurpose as a fume hood:
it already has a built-in fume hood, only without the fan, because it's for removing hot smoke that's already lighter than air. A low-tech, medieval
fume hood made of brick, clay and stone, but it's still a fume hood  To use it
for removing room-temperature fumes, you just put an electric fan into the "vyushka" lid-box, turn it on and close the lid-box door.
[Edited on 9-7-2015 by ave369]
[Edited on 9-7-2015 by ave369]
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Praxichys
International Hazard
Posts: 1063
Registered: 31-7-2013
Location: Detroit, Michigan, USA
Member Is Offline
Mood: Coprecipitated
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| Quote: Originally posted by violet sin | | stupid compy dumped my comment twice now after having written several paragraphs each time. using the lap top with out a mouse can be a pain....
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Ctrl+A, Ctrl+C. Backup text to clipboard regularly. Even better, write the reply in notepad, then paste to SM when done.
Also, if you go back and hit the refresh button when it says "confirm form resubmission" you'll get most of it back.
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The Volatile Chemist
International Hazard
Posts: 1981
Registered: 22-3-2014
Location: 'Stil' in the lab...
Member Is Offline
Mood: Copious
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Hah, you should try typing any long email on a Nokia N800 2008 internet tablet. THing mistakes the 'delete' button for a navigate backwards due to
some random bug...but it runs OS2, so I can ssh to the SDF(Super Dimension Fortress)!
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diggafromdover
Hazard to Self
Posts: 84
Registered: 24-2-2015
Location: New Hampshire
Member Is Offline
Mood: Inconherent
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Your mileage may vary
I had a good friend who played in a basement as a child in which asbestos firebrick was used around the furnace. He died of Mesothelioma in his 40's.
Asbestos which is shredding or fraying is potentially deadly, but not for every person every time.
Had his father simply painted the bricks - or left them at the shipyard - perhaps I'd still have my friend.
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Zephyr
Hazard to Others
Posts: 341
Registered: 30-8-2013
Location: Seattle, WA
Member Is Offline
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I've constructed a lab jack.
And fixed a vacuum pump that hadn't worked for >15 years.
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kecskesajt
Hazard to Others
Posts: 299
Registered: 7-12-2014
Location: Hungary
Member Is Offline
Mood: No Mood
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Im using coffee glass because thats heat proof.
Also I'm using a 100ml sirenge instead of a sep. funnel.
And I have a complete gas stove instead of a hot plate.
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Tabun
Harmless
Posts: 38
Registered: 17-4-2015
Member Is Offline
Mood: No Mood
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Just took a look around and I found some 20 and 50 mL glass bottles,some IDK what kind of plastic bottles(some round,some square shaped,maybe they are
good for storing things),a lot of glass jars,two big lightbulbs(I'm thinking about using them as round bottom ballons.I think they have a volume of
about 400mL),some...thing made out of glass which looks like a long neck,flat bottom baloon(Idk if this is the right name...I don't know how to
translate it in english but I think you know what I'm talking about) and another jar which looks like a very large neck erlenmeyer flask.I also find
some hoses(I don't know what they are made out of).Another thing was a gas lamp.
Maybe I should search the attic too.
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ave369
Eastern European Lady of Mad Science
Posts: 596
Registered: 8-7-2015
Location: No Location
Member Is Offline
Mood: No Mood
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Maybe flask, not balloon? Balloon is a bright-colored, inflatable rubber thing popular at parties.
Smells like ammonia....
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Tabun
Harmless
Posts: 38
Registered: 17-4-2015
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Mood: No Mood
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Or yes,flask.We call "balloons" whatever has this form here and "flask" the other things like berzelius and erlenmeyer but it seems like they are all
flasks in english...
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chemrox
International Hazard
Posts: 2961
Registered: 18-1-2007
Location: UTM
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Mood: LaGrangian
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| Quote: Originally posted by violet sin | | stupid compy dumped my comment twice now after having written several paragraphs each time. using the lap top with out a mouse can be a pain.... ya
PVC is cheap, durable, machinable and available... coulda used epoxy. |
I use a track ball with my laptop The little pads are usually too problematic. I write on RTV with a sharpie
"When you let the dumbasses vote you end up with populism followed by autocracy and getting back is a bitch." Plato (sort of)
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battoussai114
Hazard to Others
Posts: 235
Registered: 18-2-2015
Member Is Offline
Mood: Not bad.... Not bad.
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| Quote: Originally posted by Tabun |
Or yes,flask.We call "balloons" whatever has this form here and "flask" the other things like berzelius and erlenmeyer but it seems like they are all
flasks in english... |
Same thing here... never got why balloon but wtv I guess.
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Little_Ghost_again
National Hazard
Posts: 985
Registered: 16-9-2014
Member Is Offline
Mood: Baffled
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Havnt read whole thread yet but found this
http://www.teralab.co.uk/Glass_Blowing/Glass_Blowing_Menu.ht...
It has helped me alot with doing glass work and avoiding stressing the glass, it recommends putting any glass your cooling into a layer of vermiculite
to help it cool much slower, anyway I found it helpful so thought I would post it, it also has a method of building a simple device to see if your new
formed glass joint is stressed or not
Dont ask me, I only know enough to be dangerous
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Little_Ghost_again
National Hazard
Posts: 985
Registered: 16-9-2014
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Mood: Baffled
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| Quote: Originally posted by Loptr | | Quote: Originally posted by Magpie |
I found it in the BBQ section of a Ranch & Home store. I haven't seen one since. Avogadro's Lab Supply sells one like it (at an outrageous
price.)
Yes, I think its intended purpose is likely for a camp stove. Mine was about $15 ten years ago.
[Edited on 15-3-2015 by Magpie] |
Yeah, I have been trying to find one as well. I tried to see where Avogrado purchased theirs, but there was no getting around them.
For now, when I need a burner I just attach the burner's latex gas feed tube to the end of a propane torch, turn on the gas, and then light the
burner. It works, for now.
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http://www.ebay.co.uk/itm/Bunsen-Burner-LPG-Propane-with-Reg...
might help or
http://www.ebay.co.uk/itm/PROPANE-BUTANE-BURNER-TORCH-ADJUST...
Dont ask me, I only know enough to be dangerous
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mayko
International Hazard
Posts: 1218
Registered: 17-1-2013
Location: Carrboro, NC
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You know those rubber bulbs on dropper bottles? They can be used as test-tube stoppers in a pinch.
al-khemie is not a terrorist organization
"Chemicals, chemicals... I need chemicals!" - George Hayduke
"Wubbalubba dub-dub!" - Rick Sanchez
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h8dmike
Harmless
Posts: 1
Registered: 27-8-2015
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Mood: No Mood
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I salute everyone who pursues improvisation, truly it all began with this ,that and insatiable curiosity. I credit the lessons learned in
struggling to prevail upon myself how infinitely rewarding my learning could be by striving to make and see things differently. I've only just
recently found a perfect substitute for a pestal. The rounded end of a fire poke.
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The Volatile Chemist
International Hazard
Posts: 1981
Registered: 22-3-2014
Location: 'Stil' in the lab...
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Mood: Copious
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Nice work pinkhippo!
Recently, when adjusting the height of a Bunsen burner and trying to write notes at school simultaneously, a lab partner told me to turn the adjuster
the other way, thinking it wasn't making the flame any shorter. after a few turns in this direction, the methane jetted out onto my hand and into the
air. I quickly put the adjustment 'dial' back into the burner, but in a second, the methane ignited, and burned in a quick rush along my hand. Didn't
hurt much - it was just hot. But my hand smelled like burnt flesh the entire day.
Lesson learned: When you know you're the smartest at the table, don't take advice absentmindedly... :/
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careysub
International Hazard
Posts: 1339
Registered: 4-8-2014
Location: Coastal Sage Scrub Biome
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Mood: Lowest quantum state
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Although I work with fiberglass, making laminates, and like working with it, I think a better choice for insulating flasks is to use mineral wool or
mineral paper insulation used with kilns.
Seattle Pottery for example:
http://www.seattlepotterysupply.com/Merchant2/merchant.mvc?S...
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j_sum1
Administrator
Posts: 6220
Registered: 4-10-2014
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I have this thing that I do. whenever I am washing up glassware I break another beaker. They are not real expensive but the shipping kills.
Typically I pay more for delivery than I do for the item.
Yesterday at the cheap store I saw coffee plungers going cheap -- the french press type. For minimal dollars I got two 800mL tallform beakers, two
useful plastic scoops and some stainless steel gauze that I am sure to find a use for one day.
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aga
Forum Drunkard
Posts: 7030
Registered: 25-3-2014
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Wash carefully young jsum, or the Force will break 'em.
I need more beakers and test tubes for the exact same reason.
Lobbing them into the bucket of water with the rest of of the dirty glassware cannot be a Best Practice either.
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The Volatile Chemist
International Hazard
Posts: 1981
Registered: 22-3-2014
Location: 'Stil' in the lab...
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Mood: Copious
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| Quote: Originally posted by aga | Wash carefully young jsum, or the Force will break 'em.
I need more beakers and test tubes for the exact same reason.
Lobbing them into the bucket of water with the rest of of the dirty glassware cannot be a Best Practice either. |
Naa...I broke the bottom out of my nicest beaker (I still have the one with the etched labeling ) tapping crystals out of it. My dreams have been filled with rediculous situations in which I acquire new, nice
glassware. 
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