Black Iron Oxide - Fe3O4 - Natural - 5 Pounds

I normally wouldn’t leave a review for something like this. It is what it is. BUT, I wanted to comment on the excellent packaging. I’ve ordered this from other sites and there’s always a bit of a mess in the box. But this was as clean as clean can be. It’s even in a white bag and there’s absolutely nothing on the outside. Really great.

Black Iron Oxide - Fe3O4 - Natural - 5 Pounds great for projects with magnets.

I mixed the entire 5 lb bag into 1 gallon of paint applied in 4 coats - testing between coats - the fourth coat did the trick. This covered a 4 x 8 ft plywood sheet. I like the option of picking my own paint color rather than the chalkboard or magnetic paints advertised. Remember that the black powder will darken and flatten any paint. Recommend mixing in smaller batches for each coat and using a drill stirring stick rather than mixing by hand.

all good....

The media could not be loaded. Shipped fast. It’s a fine powder but it definitely weighs 5 lbs. you get a lot in the foil bag. You can reseal and zip the bag which is great for multi use. Be careful not to inhale the fine powder. Wear a mask. The color stains but washes off your hands easily. The magnetic property is strong and amazing. We made magnetic slime for our annual Halloween party. Worked great.

I got this for cold casting and it’s super easy to use

This is not a negative review. I just want to help others not make the mistake I made in thinking this could be used the same as black iron oxide color pigment. In the photo it took 3/4 cups of pigment added to the same amount of limewash to achieve the dark color on the left. The lighter gray on the right is after adding the entire 5lb bag of Fe3O4. If you need a true black pigment get a “black iron oxide COLOR PIGMENT” such as by Color Rare. It is not Fe3O4’s fault that it can’t be a dark pigment, was my mistake.

It did not work for magnetic slime, but may be useful for other purposes.