Iron Oxide colors

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Forum topic by bold1 posted 12-06-2016 12:22 AM 625 views 0 times favorited 3 replies Add to Favorites Watch
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306 posts in 2050 days

12-06-2016 12:22 AM

I know this isn’t the site I should post this on, but I have found there are few subjects that the members here can’t offer sound advice on. I’m working on putting Mosaic tile on the ceiling of our master bath. The wife wants colored grout. I can’t find pre mix in the color she wants. I plan to buy Iron Oxide pigment and mix several samples till she approves the shade. I’ve never mixed before. Is there a simple formula OZ. to LB. of cement for coloring grout. I’ve found formulas for concrete. Would these work or would the aggregate in the concrete change the color to much for the formula to work for grout?

3 replies so far

View Mark Shymanski's profile

Mark Shymanski

5623 posts in 3915 days

#1 posted 01-04-2017 10:31 PM

You may want to make up some samples of different ratios and see what looks the best.

-- "Checking for square? What madness is this! The cabinet is square because I will it to be so!" Jeremy Greiner LJ Topic#20953 2011 Feb 2

View corelz125's profile


568 posts in 1179 days

#2 posted 01-05-2017 01:02 AM check this company out they might have what you need.

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306 posts in 2050 days

#3 posted 01-05-2017 01:03 PM

Thank you for your replies. Between your info and some other sites I decided I needed to get some pigment and start weighing if I wanted accurate info on the grout mix. If this can help anyone else, this is what I found, using Cobalt Blue Iron Oxide pigment. 1 OZ color to 47 OZ White un-sanded grout is about the lightest shade. Anything less was almost White. 1 OZ to 18 OZ was as dark as I obtained. Any more color was wasted. By volume the light shade was approx. 1 to 8 as the Iron Oxide weighted quite a bit more than the cement. I had no other Iron Oxide colors to compare to see if their weights are the same. Thank you again.

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