Ferrofluid: Difference between revisions
Jump to navigation
Jump to search
mNo edit summary |
mNo edit summary |
||
| Line 1: | Line 1: | ||
<!-- | <!-- | ||
Ferrofluid is a [http://en.wikipedia.org/wiki/Colloid colloid] with ferrous particles, meaning that the particles and therefore the fluid as a whole will magnetize when exposed to a strong magnetic field. | Ferrofluid is a [http://en.wikipedia.org/wiki/Colloid colloid] with ferrous particles, | ||
meaning that the particles and therefore the fluid as a whole will magnetize when exposed to a strong magnetic field. | |||
Proper ferrofluid apparently coasts the particles to avoid clumping. | Proper ferrofluid apparently coasts the particles to avoid clumping. | ||
Ferrofluid is not cheap, though I don't know why. | |||
You can however make a pretty decent imitation with ''fine'' iron fillings and oil. | You can however make a pretty decent imitation with ''fine'' iron fillings and oil. | ||
The 'fine' part is the hard part, though - taking a file filing some nails isn't fine enough. | |||
One of the easiest sources of fine-enough ferrous particles is probably toner -- some | One of the easiest sources of fine-enough ferrous particles is probably toner -- some toner, at least, | ||
because aside from carbon powder and polymer (plastic) contain iron oxide, specifically magentite {{verify}}. | |||
For the oil you can use almost anything - some vegetable or mineral oil.{{verify}} | For the oil you can use almost anything - some vegetable or mineral oil.{{verify}} | ||
| Line 21: | Line 23: | ||
It's mainly plastic and iron, so it's pretty safe if you avoid drinking it. | It's mainly plastic and iron, so it's pretty safe if you avoid drinking it. | ||
It ''is'' messy. Have tissues for cleanup and don't let it near stuff that you wouldn't want close to ink. | It ''is'' messy. | ||
Have tissues for cleanup and don't let it near stuff that you wouldn't want close to ink. | |||