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| Metalworking (rec.crafts.metalworking) Discuss various aspects of working with metal, such as machining, welding, metal joining, screwing, casting, hardening/tempering, blacksmithing/forging, spinning and hammer work, sheet metal work. |
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Fun with magnesium rod??
Just bought an electric hot water tank (for use as a biodiesel reactor).
Since the magnesium sacrificial anode would interfere with the reaction, I removed it and then began wondering if there are any interesting "experiments" to be performed with it. I expect such experiments would relate mainly to combustion but there may be others. Anyone have any suggestions? Laurie Forbes |
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#2
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Hmm...
Can alloy with aluminum, if you want. Pyrotechincal persuits: - Burn plain - Grind into filings/powder - Mix half and half with aluminum ("magnalium", beware of flaring while melting!) to make a brittle, easy to crush alloy Finely divided material (either by mixing with aluminum and crushing or using plain) can be used for thermite, for example. Iron: 3 parts (by weight) Fe2O3 (red rust, heat to redness to dehydrate for the best performance), 1 part Mg/Al Lead: 10 parts PbO (yellow lead), 1 part Mg Copper: 8 parts Cu2O (red cuprous oxide), 1 part Mg Fast-burning thermites: 5 parts PbO2 (gray lead dioxide) to 1 Mg 3 parts CuO (black cupric oxide) to 1 Mg (Caution, will detonate on impact!) Other random stuff... get out your Periodic Table and find oxides you have on hand! Thermite type reactions also work with alkali metals, take lye for instance: 2Mg + 2NaOH = 2Na + 2MgO + H2 (though sodium is highly reactive, MgO is more stable, so it proceeds). Rumor has it you can get silicon semimetal the same way (i.e. SiO2 + 2Mg = Si + 2MgO), but it needs something like sulfur added to speed it along; the difference in reactivity between magnesium, aluminum and silicon isn't much. Mechanical uses... heck, wherever you need something lightweight, if it's not too pitted. Oh- you can always make a battery. Magnesium has a potential of -2.356V against hydrogen (-2.696V against copper). Hence its original use as galvanic protection ;-) Tim -- "California is the breakfast state: fruits, nuts and flakes." Website: http://webpages.charter.net/dawill/tmoranwms "Laurie Forbes" wrote in message news:xpbme.22418$wr.7748@clgrps12... Just bought an electric hot water tank (for use as a biodiesel reactor). Since the magnesium sacrificial anode would interfere with the reaction, I removed it and then began wondering if there are any interesting "experiments" to be performed with it. I expect such experiments would relate mainly to combustion but there may be others. Anyone have any suggestions? Laurie Forbes |
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Tim Williams wrote:
Hmm... Can alloy with aluminum, if you want. Pyrotechincal persuits: - Burn plain - Grind into filings/powder - Mix half and half with aluminum ("magnalium", beware of flaring while melting!) to make a brittle, easy to crush alloy Finely divided material (either by mixing with aluminum and crushing or using plain) can be used for thermite, for example. Iron: 3 parts (by weight) Fe2O3 (red rust, heat to redness to dehydrate for You want the black iron oxide. Heat rust until it turns black, or burn some steel wool. the best performance), 1 part Mg/Al Lead: 10 parts PbO (yellow lead), 1 part Mg Copper: 8 parts Cu2O (red cuprous oxide), 1 part Mg these lead based mixtures sounds scary. You don't want to breathe a cloud of lead smoke. Fast-burning thermites: 5 parts PbO2 (gray lead dioxide) to 1 Mg 3 parts CuO (black cupric oxide) to 1 Mg (Caution, will detonate on impact!) Other random stuff... get out your Periodic Table and find oxides you have on hand! Thermite type reactions also work with alkali metals, take lye for instance: 2Mg + 2NaOH = 2Na + 2MgO + H2 (though sodium is highly reactive, MgO is more stable, so it proceeds). Rumor has it you can get silicon semimetal the same way (i.e. SiO2 + 2Mg = Si + 2MgO), but it needs something like sulfur added to speed it along; the difference in reactivity between magnesium, aluminum and silicon isn't much. Mechanical uses... heck, wherever you need something lightweight, if it's not too pitted. Oh- you can always make a battery. Magnesium has a potential of -2.356V against hydrogen (-2.696V against copper). Hence its original use as galvanic protection ;-) Tim -- "California is the breakfast state: fruits, nuts and flakes." Website: http://webpages.charter.net/dawill/tmoranwms "Laurie Forbes" wrote in message news:xpbme.22418$wr.7748@clgrps12... Just bought an electric hot water tank (for use as a biodiesel reactor). Since the magnesium sacrificial anode would interfere with the reaction, I removed it and then began wondering if there are any interesting "experiments" to be performed with it. I expect such experiments would relate mainly to combustion but there may be others. Anyone have any suggestions? Laurie Forbes |
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#4
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"Cydrome Leader" wrote in message
... You want the black iron oxide. Heat rust until it turns black, or burn some steel wool. You need to heat Fe2O3 with a reducing agent, such as some organic matter or charcoal, to get it. Burnt wool will work. Fe3O4 vs. Fe2O3 is a very mild difference but the latter has more heat, having more oxygen. I suppose it depends on what you want to do. Fe2O3 + Mg: http://www.abymc.com/Video/Thermite.avi these lead based mixtures sounds scary. You don't want to breathe a cloud of lead smoke. Yes, definetly an outdoor mixture.  Tim -- "California is the breakfast state: fruits, nuts and flakes." Website: http://webpages.charter.net/dawill/tmoranwms |
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Thank you Tim for the interesting response - a lot of things to try. One
has me puzzled however - with the 2Mg + 2NaOH = 2Na + 2MgO + H2 reaction, is it done in aqueous solution and, if so, would the Na not simply react with the water to form more NaOH (& H2)? One other question - could an end of the Mg rod (about 1/2" dia) be ignited similarly to magnesium ribbon? Maybe an arc welder could be used to light it. Laurie Forbes "Tim Williams" wrote in message ... Hmm... Can alloy with aluminum, if you want. Pyrotechincal persuits: - Burn plain - Grind into filings/powder - Mix half and half with aluminum ("magnalium", beware of flaring while melting!) to make a brittle, easy to crush alloy Finely divided material (either by mixing with aluminum and crushing or using plain) can be used for thermite, for example. Iron: 3 parts (by weight) Fe2O3 (red rust, heat to redness to dehydrate for the best performance), 1 part Mg/Al Lead: 10 parts PbO (yellow lead), 1 part Mg Copper: 8 parts Cu2O (red cuprous oxide), 1 part Mg Fast-burning thermites: 5 parts PbO2 (gray lead dioxide) to 1 Mg 3 parts CuO (black cupric oxide) to 1 Mg (Caution, will detonate on impact!) Other random stuff... get out your Periodic Table and find oxides you have on hand! Thermite type reactions also work with alkali metals, take lye for instance: 2Mg + 2NaOH = 2Na + 2MgO + H2 (though sodium is highly reactive, MgO is more stable, so it proceeds). Rumor has it you can get silicon semimetal the same way (i.e. SiO2 + 2Mg = Si + 2MgO), but it needs something like sulfur added to speed it along; the difference in reactivity between magnesium, aluminum and silicon isn't much. Mechanical uses... heck, wherever you need something lightweight, if it's not too pitted. Oh- you can always make a battery. Magnesium has a potential of -2.356V against hydrogen (-2.696V against copper). Hence its original use as galvanic protection ;-) Tim -- "California is the breakfast state: fruits, nuts and flakes." Website: http://webpages.charter.net/dawill/tmoranwms "Laurie Forbes" wrote in message news:xpbme.22418$wr.7748@clgrps12... Just bought an electric hot water tank (for use as a biodiesel reactor). Since the magnesium sacrificial anode would interfere with the reaction, I removed it and then began wondering if there are any interesting "experiments" to be performed with it. I expect such experiments would relate mainly to combustion but there may be others. Anyone have any suggestions? Laurie Forbes |
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#6
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"Laurie Forbes" wrote in message
news:gDtme.32277$tt5.31518@edtnps90... One has me puzzled however - with the 2Mg + 2NaOH = 2Na + 2MgO + H2 reaction, is it done in aqueous solution and, if so, would the Na not simply react with the water to form more NaOH (& H2)? Indeed it would. In fact the Mg would just react straightaway, as it does anyways, Mg + 2H2O = Mg(OH)2 + H2. It doesn't proceed very fast. However, a mixture of Mg turnings and lye will ignite quite easily and give off orange flames of sodium vapor (since it burns that hot). Potassium also works. One other question - could an end of the Mg rod (about 1/2" dia) be ignited similarly to magnesium ribbon? Maybe an arc welder could be used to light it. Possibly. My experience (with approx. 95% Mg, cast alloy) is the whole mass must be pretty near ignition temperature to burn at all, otherwise it just sinks the heat away. Mag of this purity also melts before it burns appreciably. Go visit Theodore Gray's website and check the related story under magnesium. Then go read about the sodium party, because it's just too fun to pass up. BG Tim -- "California is the breakfast state: fruits, nuts and flakes." Website: http://webpages.charter.net/dawill/tmoranwms |
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#7
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"Ignoramus25383" wrote in message ... On Sun, 29 May 2005 04:19:41 GMT, Laurie Forbes wrote: Just bought an electric hot water tank (for use as a biodiesel reactor). Since the magnesium sacrificial anode would interfere with the reaction, I removed it and then began wondering if there are any interesting "experiments" to be performed with it. I expect such experiments would relate mainly to combustion but there may be others. Anyone have any suggestions? Mixing it with potassium permanganate would produce an explosive. A word of warning, it is a volatile compound and highly dangerous. Maybe I'll skip that one  |
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#8
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On Mon, 30 May 2005 03:36:25 GMT, "Laurie Forbes"
wrote: "Ignoramus25383" wrote in message ... On Sun, 29 May 2005 04:19:41 GMT, Laurie Forbes wrote: Just bought an electric hot water tank (for use as a biodiesel reactor). Since the magnesium sacrificial anode would interfere with the reaction, I removed it and then began wondering if there are any interesting "experiments" to be performed with it. I expect such experiments would relate mainly to combustion but there may be others. Anyone have any suggestions? Mixing it with potassium permanganate would produce an explosive. A word of warning, it is a volatile compound and highly dangerous. Maybe I'll skip that one Just do it in small lots, mix a half- teaspoonful or so at a time of Mg dust and KMNO3. It makes wonderful firecrackers with a bright flash. |
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#9
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"Don Foreman" wrote in message ... On Mon, 30 May 2005 03:36:25 GMT, "Laurie Forbes" wrote: Mixing it with potassium permanganate would produce an explosive. A word of warning, it is a volatile compound and highly dangerous. Maybe I'll skip that one Just do it in small lots, mix a half- teaspoonful or so at a time of Mg dust and KMNO3. It makes wonderful firecrackers with a bright flash. I'd try it then but I don't have Mg dust - just the rod. I guess producing filings would be easy enough but dust I don't know. How is the dust manufactured anyhow? Laurie Forbes |
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#10
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"Laurie Forbes" wrote in message news  9Hme.25139$9A2.14250@edtnps89...I'd try it then but I don't have Mg dust - just the rod. I guess producing filings would be easy enough but dust I don't know. How is the dust manufactured anyhow? In the pyrotechnics trades, we use several grades of magnesium powders. The coarser grades (larger than 400-mesh) are abrasively formed in an inert atmosphere. The really fine grades, down to 1.4 microns, are usually a by-product of a spray plating operation, and are collected cyclonically -- again, in an inert atmosphere. Mg is nasty stuff in very fine powders. It not only invigorates most pyrotechnic compositions by its readiness to oxidize, but can also be pyrophoric, which makes handing in ordinary air kind of touchy. LLoyd |
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#11
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"Laurie Forbes" wrote in message
news 9Hme.25139$9A2.14250@edtnps89...Mixing it with potassium permanganate would produce an explosive. A word of warning, it is a volatile compound and highly dangerous. Maybe I'll skip that one Permanganate in general is unstable stuff! I'd try it then but I don't have Mg dust - just the rod. I guess producing filings would be easy enough but dust I don't know. How is the dust manufactured anyhow? Probably ball milled. Chuck some swarf into a tumbling cylinder along with heavy steel shot, or bars (rod mill). Eventually, like hammering on a cold billet too long, the bits get beaten up enough that they fall apart. Then they fall apart again. After a few hours/days, you get a black substance of the form of microscopic flakes. Mind to let in air every so often so the metal can coat itself with oxide, if you go straight through without adding air it'll burst into flames when you open it! It can also be mixed with any other oxidizer, typical pyrotechnic chemicals I've read are potassium nitrate, potassium or ammonium perchlorate and potassium chlorate (tends to be sensitive). Mind any mixture with a "dark" grade of metal powder... there are horror stories! Tim -- "California is the breakfast state: fruits, nuts and flakes." Website: http://webpages.charter.net/dawill/tmoranwms |
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#12
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"Laurie Forbes" wrote in message news:gDtme.32277$tt5.31518@edtnps90... One other question - could an end of the Mg rod (about 1/2" dia) be ignited similarly to magnesium ribbon? Maybe an arc welder could be used to light it. A friend of mine had a disk of magnesium about 2 inches in diameter and 3/8 thick. He struck arcs on it, heated it with a propane torch, and got a few sputters and spurts but no ignition. He was having a party one fine weekend and set the disk on the gas burner of the kitchen range. We were standing around drinking beer and observing this chunk of metal. I saw that occasionally there was a spark or two where the arcs had struck and I wondered if applying a little oxygen would help. I pulled the guts out of a Bic pen and used this as a blow tube. It appeared to increase the sputtering so I kept at it and then the chunk lit off. The light the stuff gave off was intense as was the copious amounts of smoke. I picket up a set of tongs to grab the disk and toss it outside, but the stuff just melted and I had to use a spoon to recover the burning glob and tossed it in to the garden. It had burned a hole clear through the aluminum burner. If you insist on playing with this, do it outside, stay upwind, and do it over a bucket of sand. -- Roger Shoaf About the time I had mastered getting the toothpaste back in the tube, then they come up with this striped stuff. |
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#13
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Potassium Permanganate is not any more unstable than pool chemicals.
Keep it awqay from oils and such and dry and its as safe as storing baking flour. I use about 250 pounds a year for my own use and probably mix up over 3/4 to 1 ton or more for others that I cater to in keeping their farm ponds etc cleaned up. On Mon, 30 May 2005 11:58:47 -0500, "Tim Williams" wrote: ==="Laurie Forbes" wrote in message ===news 9Hme.25139$9A2.14250@edtnps89...=== Mixing it with potassium permanganate would produce an explosive. A === word of warning, it is a volatile compound and highly dangerous. === === Maybe I'll skip that one === ===Permanganate in general is unstable stuff! === === I'd try it then but I don't have Mg dust - just the rod. I guess === producing filings would be easy enough but dust I don't know. === How is the dust manufactured anyhow? === ===Probably ball milled. Chuck some swarf into a tumbling cylinder along with ===heavy steel shot, or bars (rod mill). Eventually, like hammering on a cold ===billet too long, the bits get beaten up enough that they fall apart. Then ===they fall apart again. After a few hours/days, you get a black substance of ===the form of microscopic flakes. Mind to let in air every so often so the ===metal can coat itself with oxide, if you go straight through without adding ===air it'll burst into flames when you open it! === ===It can also be mixed with any other oxidizer, typical pyrotechnic chemicals ===I've read are potassium nitrate, potassium or ammonium perchlorate and ===potassium chlorate (tends to be sensitive). === ===Mind any mixture with a "dark" grade of metal powder... there are horror ===stories! === ===Tim ============================================== Put some color in your cheeks...garden naked! ~~~~ }((((o ~~~~~~ }{{{{o ~~~~~~~ }(((((o |
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#14
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The rec.pyrotechnics group will have many suggestions for this rod.
Doug |
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#15
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If I recall my school boy chemistry, Potassium Permanganate is catalyst.
It is stuff that makes things happen. Martin ~Roy~ wrote: Potassium Permanganate is not any more unstable than pool chemicals. Keep it awqay from oils and such and dry and its as safe as storing baking flour. I use about 250 pounds a year for my own use and probably mix up over 3/4 to 1 ton or more for others that I cater to in keeping their farm ponds etc cleaned up. On Mon, 30 May 2005 11:58:47 -0500, "Tim Williams" wrote: ==="Laurie Forbes" wrote in message ===news 9Hme.25139$9A2.14250@edtnps89...=== Mixing it with potassium permanganate would produce an explosive. A === word of warning, it is a volatile compound and highly dangerous. === === Maybe I'll skip that one === ===Permanganate in general is unstable stuff! === === I'd try it then but I don't have Mg dust - just the rod. I guess === producing filings would be easy enough but dust I don't know. === How is the dust manufactured anyhow? === ===Probably ball milled. Chuck some swarf into a tumbling cylinder along with ===heavy steel shot, or bars (rod mill). Eventually, like hammering on a cold ===billet too long, the bits get beaten up enough that they fall apart. Then ===they fall apart again. After a few hours/days, you get a black substance of ===the form of microscopic flakes. Mind to let in air every so often so the ===metal can coat itself with oxide, if you go straight through without adding ===air it'll burst into flames when you open it! === ===It can also be mixed with any other oxidizer, typical pyrotechnic chemicals ===I've read are potassium nitrate, potassium or ammonium perchlorate and ===potassium chlorate (tends to be sensitive). === ===Mind any mixture with a "dark" grade of metal powder... there are horror ===stories! === ===Tim ============================================== Put some color in your cheeks...garden naked! ~~~~ }((((o ~~~~~~ }{{{{o ~~~~~~~ }(((((o -- Martin Eastburn @ home at Lion's Lair with our computer lionslair at consolidated dot net NRA LOH, NRA Life NRA Second Amendment Task Force Charter Founder ----== Posted via Newsfeeds.Com - Unlimited-Uncensored-Secure Usenet News==---- http://www.newsfeeds.com The #1 Newsgroup Service in the World! 120,000+ Newsgroups ----= East and West-Coast Server Farms - Total Privacy via Encryption =---- |
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#16
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On Mon, 30 May 2005 21:22:25 -0500, "lionslair at consolidated dot
net" "lionslair at consolidated dot net" wrote: If I recall my school boy chemistry, Potassium Permanganate is catalyst. It is stuff that makes things happen. I'm no chemist, but I think potassium permanganate is an oxidizer. From my schoolboy chemistry I recall manganese dioxide as a catalyst when making oxygen though I don't recall what else was in the test tube at the time. |
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#17
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"Don Foreman" wrote in message ... On Mon, 30 May 2005 21:22:25 -0500, "lionslair at consolidated dot net" "lionslair at consolidated dot net" wrote: If I recall my school boy chemistry, Potassium Permanganate is catalyst. It is stuff that makes things happen. I'm no chemist, but I think potassium permanganate is an oxidizer. From my schoolboy chemistry I recall manganese dioxide as a catalyst when making oxygen though I don't recall what else was in the test tube at the time. Probably Potassium Chlorate. MnO2 acts as a catalyst.... |
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#18
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"Tim Williams" wrote in message ... "Laurie Forbes" wrote in message news:gDtme.32277$tt5.31518@edtnps90... One has me puzzled however - with the 2Mg + 2NaOH = 2Na + 2MgO + H2 reaction, is it done in aqueous solution and, if so, would the Na not simply react with the water to form more NaOH (& H2)? Indeed it would. In fact the Mg would just react straightaway, as it does anyways, Mg + 2H2O = Mg(OH)2 + H2. It doesn't proceed very fast. However, a mixture of Mg turnings and lye will ignite quite easily and give off orange flames of sodium vapor (since it burns that hot). Potassium also works. OK - sounds worth trying. Go visit Theodore Gray's website and check the related story under magnesium. Then go read about the sodium party, because it's just too fun to pass up. BG I did that and it made me wish I had know someone like that when I was a kid as I had a strong childhood interest in chemistry but with practically no-one to share it. Laurie Forbes |
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On Mon, 30 May 2005 03:36:25 GMT, "Laurie Forbes"
wrote: "Ignoramus25383" wrote in message ... On Sun, 29 May 2005 04:19:41 GMT, Laurie Forbes wrote: Just bought an electric hot water tank (for use as a biodiesel reactor). Since the magnesium sacrificial anode would interfere with the reaction, I removed it and then began wondering if there are any interesting "experiments" to be performed with it. I expect such experiments would relate mainly to combustion but there may be others. Anyone have any suggestions? Mixing it with potassium permanganate would produce an explosive. A word of warning, it is a volatile compound and highly dangerous. Maybe I'll skip that one Potassium permanganate and glycerine are commonly considered to be a staple in the survivalists bug out bag. The PP works well as a disenfectant, a water treatment and when mixed properly with a bit of glycerine, makes a very decent all weather fire starting mixture for wet wood. Anti-freeze also works quite well (glycol types) Then there is powdered swimming pool clorine and brake fluid... I rather like potassium permanganate also as a wood stain on blond rifle stocks. Depending on how many times you bathe it..it will develope a beautiful purplish tinge that compliments good blueing. Gunner "Considering the events of recent years, the world has a long way to go to regain its credibility and reputation with the US." unknown |
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"Gunner" wrote in message ... On Mon, 30 May 2005 18:03:50 GMT, (~Roy~) wrote: Potassium Permanganate is not any more unstable than pool chemicals. Keep it awqay from oils and such and dry and its as safe as storing baking flour. You can make a really BIG bang with baking flour if you work it right |
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#22
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On Mon, 30 May 2005 21:22:25 -0500, "lionslair at consolidated dot
net" "lionslair at consolidated dot net" wrote: ===If I recall my school boy chemistry, Potassium Permanganate is catalyst. ===It is stuff that makes things happen. === ===Martin === Not quite, its a heavy duty oixidizer.........that has many many uses and is very handy from making water safe to drink to knocking out algae and crud and fungus from ponds and other bodies of water, to coloring wood. ============================================== Put some color in your cheeks...garden naked! ~~~~ }((((o ~~~~~~ }{{{{o ~~~~~~~ }(((((o |
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#23
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Let the record show that "Tom Miller" wrote back
on Tue, 31 May 2005 20:58:50 +1000 in rec.crafts.metalworking : "Gunner" wrote in message .. . On Mon, 30 May 2005 18:03:50 GMT, (~Roy~) wrote: Potassium Permanganate is not any more unstable than pool chemicals. Keep it awqay from oils and such and dry and its as safe as storing baking flour. You can make a really BIG bang with baking flour if you work it right Yeah, but you have to work at it. Flour in the bag is not a hazard. But I do recall a story about a handful of flour in a small paper bag around the exposed filament of a lightbulb inducing a laundry overload. tschus pyotr -- pyotr filipivich. as an explaination for the decline in the US's tech edge, James Niccol wrote "It used to be that the USA was pretty good at producing stuff teenaged boys could lose a finger or two playing with." |
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#24
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From my schoolboy chemistry I recall manganese dioxide as a catalyst
when making oxygen though I don't recall what else was in the test tube at the time. You would be refering to the decomposition of denatured alcohol with manganese dioxide as the catalyst to form oxygen gas. An interesting side comment is that pieces of raw liver from the grocery store will also work as a catalyst, if slightly less effective. Enzymes in the liver are specially designed for breaking down alcohol. |
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#25
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On Wed, 01 Jun 2005 18:05:03 GMT, pyotr filipivich
wrote: Let the record show that "Tom Miller" wrote back on Tue, 31 May 2005 20:58:50 +1000 in rec.crafts.metalworking : "Gunner" wrote in message . .. On Mon, 30 May 2005 18:03:50 GMT, (~Roy~) wrote: Potassium Permanganate is not any more unstable than pool chemicals. Keep it awqay from oils and such and dry and its as safe as storing baking flour. You can make a really BIG bang with baking flour if you work it right Yeah, but you have to work at it. Flour in the bag is not a hazard. But I do recall a story about a handful of flour in a small paper bag around the exposed filament of a lightbulb inducing a laundry overload. You can make a very realistic dragon flame with a quart of powdered Cremora, some compressed air to put it in flight, and a properly placed pilot-light ignition source in the powder stream. -- Bruce -- -- Bruce L. Bergman, Woodland Hills (Los Angeles) CA - Desktop Electrician for Westend Electric - CA726700 5737 Kanan Rd. #359, Agoura CA 91301 (818) 889-9545 Spamtrapped address: Remove the python and the invalid, and use a net. |
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#26
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I have seen this experiment done with 30% H2O2 (hydrogen peroxide) and
manganese dioxide. It released the extra oxygen in the peroxide and turned it into water. "woodworker88" wrote in message oups.com... From my schoolboy chemistry I recall manganese dioxide as a catalyst when making oxygen though I don't recall what else was in the test tube at the time. You would be refering to the decomposition of denatured alcohol with manganese dioxide as the catalyst to form oxygen gas. An interesting side comment is that pieces of raw liver from the grocery store will also work as a catalyst, if slightly less effective. Enzymes in the liver are specially designed for breaking down alcohol. |
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#27
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Bruce L. Bergman wrote:
On Wed, 01 Jun 2005 18:05:03 GMT, pyotr filipivich wrote: Let the record show that "Tom Miller" wrote back on Tue, 31 May 2005 20:58:50 +1000 in rec.crafts.metalworking : "Gunner" wrote in message ... On Mon, 30 May 2005 18:03:50 GMT, (~Roy~) wrote: Potassium Permanganate is not any more unstable than pool chemicals. Keep it awqay from oils and such and dry and its as safe as storing baking flour. You can make a really BIG bang with baking flour if you work it right Yeah, but you have to work at it. Flour in the bag is not a hazard. But I do recall a story about a handful of flour in a small paper bag around the exposed filament of a lightbulb inducing a laundry overload. Ever seen pictures of a flour silo that exploded after being emptied? Impressive. You can make a very realistic dragon flame with a quart of powdered Cremora, some compressed air to put it in flight, and a properly placed pilot-light ignition source in the powder stream. -- Bruce -- Cool.. The wife and I were talking about how it'd be cool to do a Chinese dragon for halloween.. John |
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