First . . . no, there is no other way to test a magnet's usefull power. Our company manufactures very high quality ceramic magnets and our testing equipment is calibrated and very accurate.
As for the mumbo jumbo . . . well . . . that's really all it is.
Peak Energy Density: The point on the demagnetization curve where the product of B and H is a maximum and the required volume of magnet material required to project a given energy into its surroundings is a minimum.
Residual Induction: This is the point at which the hysteresis loop crosses the B axis at zero magnetizing force, and represents the maximum flux output from the given magnet material. By definition, this point occurs at zero air gap, and therefore cannot be seen in practical use of magnet materials.
Coercive Force: The demagnetizing force, measured in Oersteds, necessary to reduce observed induction, B, to Zero after the magnet has previously been brought to saturation.
Intrinsic Coercive Force: Measured in Oerseds in the cgs system, this is a measure of the material's inherent ability to resist demagnetization. It is the demagnetization force corresponding to zero intrinsic induction in the magnetic material after saturation. Practical consequences of high Hci values are seen in greater temperature stability for a given class of material, and greater stability in dynamic operating conditions.
Magnetizing force: The magnetomotive force per unit length at any point in a magnetic circut.
As you can see, the numbers on the back of the package are either immeasurable, or inconsequential to the actual usable force of the magnet. That is measured with a gauss meter as I have done.
If you want to do a simple test yourself, try holding sheets of paper to the refridgerator with the stock magnets and r.e. ones the way that actofgod did. He came up with both of them being able to hold about the same amount = same amount of magnetized force.
Clear as mud, huh?
