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micr toner ferrofluidmicr toner ferrofluidhow to make your own   iron fillings science experiments Member of the Federation of Small Businesses laser printer cartridge
  TonerTopUp supplies toner refills for laser printers, fax machines and copiers from the UK. We supply bottles of toner and laser printer refill kits to make refilling cartridges easy. Laser toner cartridges can be simply refilled several times to save you money. Environmentally friendly! We supply HP Hewlett Packard Brother Canon Epson Lexmark Konica Minolta QMS OKI Samsung Xerox laser refill toner and many other types!
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MICR Toner for Ferrofluidmake your own

What is MICR Toner?

MICR stands for Magnetic Ink Character Recognition. It is a specialist toner used for printing cheques. It is highly magnetic, for making magentic print on the cheque. This enables cheques to be scanned automatically. Certain laser printer models are designed for printing with MICR toner. We stock MICR toner alongside the regular toner so these special cartridges can be refilled.

There is another use for MICR toner - making ferrofluid. We have been asked many times to supply bottles of MICR toner for this purpose. If you are looking to buy a bottle, the button below takes you to our product page where it is available to order.


What is Ferrofluid?

Ferrofluid is a magnetic fluid made out of very small pieces of iron or iron oxides suspended in a liquid. The shapes and flow of ferrofluid show how magnetic field lines curve around magnetic objects. They are surprising and beautiful to see.

What do I need to make Ferrofluid?

There are usually three things you need:

-A form of tiny iron particles - we suggest using MICR toner.
-A carrier fluid (to make it flow)
-A surfactant (ie. emulsifier), to keep the particles from clumping.

Once you have iron particles, they can be suspended in vegetable oil, mineral oil, or lightweight motor oil. Some suggest a mixture of isopropanol and water, but anything with water will cause your iron to rust. The less viscous the carrier fluid, the more dramatic the peaks will be. Finding a good surfactant so you have a suspension, rather than iron sitting in the bottom of a bottle of fluid, is the challenge. On the other hand, iron sitting in the bottom of a bottle of fluid is also interesting to experiment with.
   
 
Background Information

It’s generally difficult to make a magnetic liquid because once you melt a magnetic material (like iron) it’s not magnetic anymore. When heated past the Curie point magnetic materials lose their magnetism – the thermal energy in the metal overwhelms the tendency of the magnetic domains to align with each other. The melting point for iron is 1000°C, but its Curie point is 800°C. Ferrofluid was originally developed by NASA because they needed to be able to control liquids in low gravity. Today they’re used to damp high-end speakers, and as liquid seals in hard drives and other applications.
   
 
Experiment Ideas

Here are some ideas to show magnetic fields. You will need a strong magnet to carry out these experiments. Please note we do not have experience doing these ourselves:

1. Pour the magnetic fluid into a Petri dish, or in a vial or test tube, and put a magnet underneath.

2. Put clear mineral oil in a vial or test tube and add a small amount of fluid, and put a magnet next to it.

3. Put nuts and bolts and other steel/iron objects in the magnetic fluid and bring a magnet close to it. Make sure there is something between the magnet and the iron object (such as a Petri dish) or else the iron object will jump to the magnet.

4. Attach a string to a stack of magnets, and lower into a test tube. Lower the test tube towards magnetic fluid in a Petri dish. The fluid will leap from the Petri dish to the bottom of the test tube, defying gravity and delighting the audience. To make the jump a little more dramatic you can put another magnet beneath the petri dish. You should be able to remove the magnets from the test tube (without the fluid following up the outside of the tube) by pulling them up very swiftly (making the fluid fall back into the petri dish). Alternatively, you can cut a hole in a rubber stopper the size of the test tube, and fit that over to keep it in place.

   
 
Purchase a bottle today!

We supply it in 230g bottles. It costs £27.70 plus vat per bottle. You may click on the button below to go to the product page and order MICR toner for ferrofluid.

   


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TonerTopUp is a trading name of Smith & Young Sales Ltd
The White House, Toys Hill, Westerham, Kent TN16 1QG England
Telephone: 01732 750364
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