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[Antalia]

So, I had this almost-great idea to use magma to burn up invaders and all their non-iron, non-steel clothes. This works well enough, except for one problem. When a hauler goes into the (drained) magma chamber to pick up the goblins' iron weapons and armor, their hand melts off when they pick up an item. This leaves an alarming trail of blood pools that ends in a puddle of "dwarf grease", and it may destroy the hauler's handwear. The haulers are left with scars afterward, such as, "The fat in her left hand is completely gone." (That wording may not be exact.)

After that incident happened, I tried waiting several months to let items cool off after purging their prior owners with fire. But the first dwarf into the room picked up an iron axe and promptly melted her hand right off.

I haven't yet had any haulers bleed to death, or catch fire, but it seems like only a matter of time before someone gets unlucky.

So, how do I properly cool (iron and steel) stuff off that's been dunked in magma, so that the haulers can pick it up without injury? (Also, if this ends up being related...I'd really like to avoid making obsidian if at all possible.)

[Friendstrange]

First things first: Is there still magma in the area when you send your haulers?
 Second: You could try just watering everything but I believe that will only generate steam.

I havent dabbled much with magma purging so Im sure some of the fine gentlemen here will have a better answer for you.

[AutomataKittay]

You probably should have grate drains for the magma. I haven't had trouble with magma as long as they're all dried up, so could you use 'k' to check over the tiles to see if there're any 1/7 magma left?

[nitus]

Have you tried flooding it with water?

[The Grackle]

Weird.  Sounds like a bug.  Check to see if the floor is still blinking hot even after the magma is long gone.

I'd try making a bin of nether cap wood, then making a stockpile in the room so the haulers only have to carry it a step.  Maybe that will force a temp check on the item or something.  Maybe?  Or open your chamber up to the outside, if it isn't already, to see if seasonal freezes/weather help. 

And fat can only melt once, so your dwarves should be able to safely handle hot items after their wounds heal.  I know that in adventure mode, if you melt off all your fat (and survive), you can become almost immune to fire.

[AutomataKittay]

Just thought of another possible problem after noticing my dwarves getting their fat melted off ( in .18 so not sure if yours applies ) the problem was a !!clothing!! ( a piece of clothing on fire ). Check for that too, it can burn for a while.

[LuckyLuigi]

Hilarious, I'm building the exact same thing, and I had not considered this yet.

*follows thread with interest*

[Antalia]

Is there still magma in the area when you send your haulers?

I waited until there were just a couple little 1/7 pools around the place, on tiles that didn't have grates. I realized, when I dunked some more stuff today, that tiles prioritize displaying magma and not any items in them, unless I use "k" to check. Also, I sort of assumed my haulers wouldn't be silly enough to touch any items located in a magma pool. So it is possible my haulers grabbed something from one of the few tiles with 1/7, and I didn't notice anything but the resulting highway of blood etc.

You probably should have grate drains for the magma.

Check to see if the floor is still blinking hot even after the magma is long gone.

What I've built is kind of sloppy, and I'm not experienced doing this either This is definitely right and the latter is a problem - and I think I need to use a one- or two-tile-wide floor, so that I can cover the whole thing with grates. I was using a square-shaped room for my experiments, and that's not working very well.

Have you tried flooding it with water?

When I was experimenting with this early on (well...I'm still experimenting), I tried flooding the room with water dropped from a bridge. This worked, but was troublesome. On the positive side, it cooled everything immediately and created obsidian for my miners to have fun with--and the encased items conveniently fell out when they did. This was all very amusing and macro-friendly But my map doesn't have natural obsidian--so it doesn't allow me to specify using obsidian as a building material. And so I have unusable chunks of obsidian around the place that are only good for atom smashing as a result--and I'd like to avoid creating more

your dwarves should be able to safely handle hot items after their wounds heal

Aha, I was worried that if they handled something ulta-hot with their fat gone, that they'd catch fire:) Picking up hot stuff probably isn't anything to worry about, health-wise (but there are the !!XXglovesXX!!). In the earliest experiment, I had a soldier run in and grab a recently-dunked iron helm and put it on, and his status screen said, "His head is melted," and, "His head is gushing his dwarven blood". It left my main stairway a practical waterfall of blood, and I panicked a bit. (He is alive and well, long after the incident.)

[AutomataKittay]

Have you tried flooding it with water?

When I was experimenting with this early on (well...I'm still experimenting), I tried flooding the room with water dropped from a bridge. This worked, but was troublesome. On the positive side, it cooled everything immediately and created obsidian for my miners to have fun with--and the encased items conveniently fell out when they did. This was all very amusing and macro-friendly But my map doesn't have natural obsidian--so it doesn't allow me to specify using obsidian as a building material. And so I have unusable chunks of obsidian around the place that are only good for atom smashing as a result--and I'd like to avoid creating more

You can turn on obsidian usage, you'll have to remove the bracket around MAX_EDGE after exiting the game, in the save raw for stones, specificlly the obsidian entry, open the game, mark it green, close the game and add the brackets back so you can make rock shortsword from it, and use it for other stone purposes.

[Triaxx2]

Fast Magma dumping? Build floor of hatches, link all to one lever. Next level down has all grate floor. Ensures rapid drain, easy item retrieval.

Increased convolution also allows for dumping water over to ensure maximum cooling.

[Aachen]

You can turn on obsidian usage, you'll have to remove the bracket around MAX_EDGE after exiting the game, in the save raw for stones, specificlly the obsidian entry, open the game, mark it green, close the game and add the brackets back so you can make rock shortsword from it, and use it for other stone purposes.

You only need to edit the raws if you want obsidian weaponry — for other purposes,

[ z ] --> Stones

and enable (marking it green) obsidian to allow it for non-economic (stone-specific) purposes.

[AutomataKittay]

You can turn on obsidian usage, you'll have to remove the bracket around MAX_EDGE after exiting the game, in the save raw for stones, specificlly the obsidian entry, open the game, mark it green, close the game and add the brackets back so you can make rock shortsword from it, and use it for other stone purposes.

You only need to edit the raws if you want obsidian weaponry — for other purposes,

[ z ] --> Stones

and enable (marking it green) obsidian to allow it for non-economic (stone-specific) purposes.

Err, the bug's Obsidian -won't- show up on stone selection on vanilla, you have to remove the MAX_EDGE so it'll show up on the stone selection. The obsidian shortsword's vanilla. The MAX_EDGE bugs up the stone selection, apparently.

[Aachen]

Woah, really?

Bullocks.

Then, agreed.

[AutomataKittay]

Woah, really?

Bullocks.

Then, agreed.

http://df.magmawiki.com/index.php/Obsidian Yup. Most people wouldn't notice, not being too into obsidian-farming, or embarking somewhere that already have obsidian ( which automatically turns them green on stone screen, like with flux stones ). A bit annoying, but fix's just a hop around 

[Areyar]

But my map doesn't have natural obsidian--so it doesn't allow me to specify using obsidian as a building material. And so I have unusable chunks of obsidian around the place that are only good for atom smashing as a result--and I'd like to avoid creating more

This... I find highly curious... and would not have expected. ..it must be a slug.


edit: never mind. read the ninja-posts.