HOW TO KNOW IF YOUR GRINDER IS MADE OF IRON
In order to determine whether your grinder contains iron, simply use a magnet. If the magnet sticks to your grinder, it contains plenty of iron. Another way to know is through the texture of the blades. If you can recognize little dots all over the surface, it means it wasn’t milled, but molded.IRON GRINDERS’ POPULARITY
Iron grinders are cheap since they are made by a die casting process, which is very common. If they shine, it means they have been coated with nickel plating, which is not recommended for food and medical devices, to say the least.
Iron is highly oxidative—any contact with water will immediately show its mark on the surface. Iron is soft, so an iron grinder will gum-up very quickly. Beware of iron grinders.
IRON |LEAD | ZINC | SILICA
There is a deep connection between the above-mentioned materials. Basically, in order for an iron grinder to be cheaply made, manufacturers will incorporate lead, zinc, and silica. Lead flows very well into molds, but not so much in your body! There is also a relation between these materials and arsenic, which in small quantities can be deadly for your body.