Q: Thank you so much for your article on rust and oxalic acid ("Rust isn't her best color," Jan. 7). We have had this problem for years! And it is frustrating. We even have our water treated ...

Wooden furniture and flooring can stain and darken over time. Or sometimes, it's just too dark in the first place. Here's a ...

This article was originally published with the title “ The use of Oxalic Acid in Preserving the Color of Dried Plants ” in SA Supplements Vol. 42 No. 1078supp (August 1896), p. 17226 doi:10. ...

Oxalic acid, or oxalate, is a compound in many plant foods. In large quantities, it can inhibit the absorption of some nutrients. Learn more.

To use oxalic acid, mix one-half cup of the powder in a gallon of warm water and mop it on the stain. Let it work for five to 10 minutes, keeping the stain wet, then scrub with a stiff-bristled ...

Oxalic acid is sold in crystal or powder form at paint stores. Mop the solution over the stain and allow it to work for two or three hours, then pour on ...

Ever notice a gritty film covering your teeth after eating a spinach salad? This phenomenon, called "spinach tooth," happens because the leafy greens are chock-full of oxalic acid. This naturally ...