never re-shingle your roof in the winter

But if you do, don't eat the yellow snow....

just curious, why is there yellow snow on the roof? lol

<> and those aren't raisins either.....

lmfao lmfao nice

for that matter, make sure you "turn it off" in the proper direction when finished *faroooph* whoops....

Nice, I only burn the most sensitive part of my body, not one of the more sensitive places.

I have found that having drunk friends over while working by the forge is not safe. Poor fellow still have a nasty scar.

The idea isn't to touch it and burn a sensitive part of your body, but to hold your fingers over it to feel the radiant heat so you don't grab it and burn yourself.

Yea, and what about e.g. spitting on it instead of endagering sensitive parts of your body?

Spitting on some hot metals is a very bad idea. BOOM!

What, like molten sodium?

Sodium doesn't have to be hot. Magnesium and Aluminum and possibly titanium. And sure, if your Li-ion laptop blows up, don't try to put it out with a cuppa coffee!

also bad to spit on: lime. on contact with water, lime produces an exceptionally hot exothermic reaction. a Japanese farmers barn burned down when his cat urinated on a bag of lime once.

Um, do you mean "slacked lime" as far as contact with plain water is concerned? Urine is another matter, it has both ammonia and lactic acid in it and that will react with regular lime.

Which hot metals then, w/ref BOOM! (I don't know)? I haven't spat on hot aluminuim, magnesium or titanium. I have tried to burn magnesium, take a bit of getting going, I thing spit would put it out? L

VIRON doesn't (and hasn't) had a clue.

Magnesium burns hot enough that it can disassociate water and use the O₂ to keep burning. Not sure of titanium, but the 3000+ degree oxidation temp suggests something similar to magnesium. I've done water casting with aluminum (dump molten aluminum in a large bucket of water slowly-makes neat random shapes) without a problem. You don't want to get a small amount of water under or inside an aluminum melt (like spilling on concrete or adding a can with a little water in it) because the steam can throw the liquid metal quite far. Water ON an aluminum melt just boils away-as light as it is, it still sinks in water : )

that is why they use it to ignigte thermite

And what does the greater volume of dissociated H2 do?

Adds to the gassing off, along with the excess steam that isn't disassociated and the magnesium oxide. Look into how chemistry works. Each element is ranked by how reactive it is-the more reactive elements can 'steal' from less reactive ones. Aluminum can 'steal' the oxygen from rust, better known as thermite.

Ok, so somehow water on molten magnesium in a forge is safe, but elsewhere it goes BOOM! Sorry, I don't think I have ever "committed forgery". :)

Molten magnesium is burning if there is any oxygen available-so no, it isn't safe. And magnesium does not go boom-it's a very stable element, used in light weight transmissions and occasional small engine housings.

You aren't looking at the mechanics-water becoming steam creates pressure. If there is something ON TOP of the steam, it can be dangerous. If the steam is on top, there is nothing to for the steam to throw.

Look up Dihydrogen monoxide to see what an incomplete understanding of what is dangerous can do.

thats a pretty cool link. awesome "project"...

Whatever. You're not looking at the chemistry. If you did you'd go blind anyway. And mechanically, you're saying a surface explosion makes no waves.

It's not an explosion-the heat reaches the water before it gets to the surface (the water never touches the surface) and creates a steam blanket. The steam blanket has an insulating effect, preventing spontaneous gasification of all the water.

When I'm melting metal, I use a welding filter. Am I still not looking at the chemistry?

If you have a crucible of magnesium large enough to worry about waves, you are at a commercial smelter and don't have to worry about water. Of course, there is the problem of getting the water past the inert atmosphere needed to melt magnesium in the first place...

Go back, you are thinking of ALUMINUM and typing MAGNESIUM.

Your whatever shows that you don't care about what you are saying, only that you want to win an argument.

OK, You win. May the forge be with you.

Water boils at 100 C, so unless you can comfortably hold a heavy object at 99 C it's not a good test. The back of the hand test is good because you SLOWLY approach the metal, not touching it until you are sure of the temp.

After a few minutes at the forge, I'm not licking my hand. After a half hour or so, I probably couldn't get enough spit to use. I will use a handful of quench tub water to cool off/check the temp of something, but I don't trust the test much.

I have experience with the cliff part, and a 17 inch scar to prove it (no surgery, as I feel my leg hit something) and you are correct about beware of it in general, I've broken 3 toes with hammers, cracked a rib out of a tree, and gotten 2 concussions falling down stairs, I am generally clumsy

Geeze...there went my Plan to ignore gravity by not knowing about it.

Thanks a lot, you !@#$%^&*(

: )

Just remember, gravity is your friend (it helps you stay on the ground and not float into space and get frozeded). Except if you're a skydiver, and your parachute doesn't work. Then it kinda doesn't like you. A lot. It wants to kill you. Hmmm...it seems the forces of nature have a grudge against me...how inconveniant!

Hydrogen Hydroxide, and now gravity conspiring to kill me. Damn. Reminds me of a joke. What's the difference between a bad golfer and a bad skydiver? WHACK!.......Damn! Damn!......WHACK!

NNNNOOOOOOOOOOO!!!!!!!!!!!!! Now selling pre-plotted moon house lots by dragging myself up by my bootstraps into orbit and jumping off the space station down onto the moon (and the same way back) won't work! You nasty, nasty...TEACHER! Oops, now I'm going to get my mouth washed out with soap...

Lmao.

If there was no gravity, someone would have invented it way before you were born.

Too late with the flying chairs:

BOOK:
Hacking Matter: Levitating Chairs, Quantum Mirages, and the Infinite Weirdness of Programmable Atoms

Dude, you lot are completly and utterly undiniably HILARIOUS!

Hayyyy, shift 6 creates superscripts... Anyone know if there is a list of such for instructables?

Oh yes I found that the caret gives you ^superscript.
I've also learned (through a Forum post) that double commas give you _subscript.
(they behave as toggles)
L

Yes, I saw that. I seem to have a habit of following your posts around : )

When you find an interesting comment or person it's often worthwhile clicking on them and looking up their posts. However, you then get a bit of a feeling that you're staliking someone or something...? L

Not really, since I'm fairly certin your a guy, cause if yu weren't, well (gulp) um, that would make a grade B internet shadower... Argh! Is your picture really you or somebody else? It's the same body that stuck their head in a dryer, please say yes, oh please, please, (infinetly long repetation of plees, cut short to give room for everbody else and save the fourth demension),...

See to have missed this first time 'round... Yes L

this applies especially to the cheap slide in tips of 45 watt soldering irons when they come flying out at your legs and vintage 1990 Saturn floor mats.

How is zinc oxide going to 'cake up' a forge? It vaporizes into a fine, white powder (sometimes with a yellow cast).

I imagine it "snows", as an interpretation of "cake up".

Still doesn't make sense. There's more ash (which turns to clinker, a very different thing than 'cake up') even with great coal than you would get with a heavy zinc coating. 'Cake up' would be the cementation of the coal or charcoal to the point that it won't provide sufficient heat. Small pieces of coal will coke up into a larger mass that provides a more focused heat, but that is a good thing, not the bad thing that was described.

Vendigroth took the words out of my post. the link at anvilfire.com has the pic of the deposit of zinc oxide. (cake up wasn't a good word to use)

If you touch it, it's a fine powder, easy to disturb (that's why the pic shows the pipe segments still in place). I thought of nominating him for a Darwin Award just after it happened, but couldn't come up with a good bit of humor to add.

ok... i am going to get on with life if zinc is burns to a fine powder i am fine with it just dont go breathing it

looks like im not the only one who goes to anvil fire poor paw paw

Our cats are all that smart either. Poor fur.

It's dangerous if you breath to much, a small amount isn't going to kill you (nor is a large amount-the secondary pneumonia does), but how does it 'cake up' the forge?

The zinc oxidizes/burns quickly, something you have to be careful about in a brass or zinc melt. A forge doesn't have an exhaust to 'cake up' unless you assume a gas forge, but all the zinc oxide (from burning) that I've seen is a fine powder. I'm not saying that vaporized zinc oxide isn't dangerous if you get too much, just that the original post was not helpful without more info : )

If you do wear heavy leather gloves I also heard its better not to: 1. It will teach you to check for hot metals 2. The day you don't wear your gloves you can burn your hands If anything say you don't want to rough up ur hands then you should get the really thin but strong ones, also know as second skin

It is okay, but make sure you can get them off easily so if they ketch on fire you can get them off and not burn your hand.

When (BEFORE) you put a piece of pipe in the forge, tape, seal or plug the other end or it will act like a chimney and the whole thing will heat up (and you will burn your hand when you go to grab the 'cool' end).

You can test the alarm circuit, but how do you test the detector-or do you just trust it-in which case why would the alarm circuit be bad but not the detector? I understand checking the battery, but winter here kills any (outdoor) battery quickly.

The test button usually only checks the battery-the americonium? in a fire detector is only rated for something like ten years. I forge outside, so as long as I keep my head out of the smoke, I figure I'm fine (that's why my forge has a chimney).

CO alarm need to be correctly positioned.
As Tool Using Animal hot zinc is bad news, as is brass.
I've got plenty of chemical hazards if you want a list.

L