1. Use hot water to adjust the industrial oxalic acid solution, the concentration is between 1% and 1.5%, dip in the oxalic acid solution with oil brush, smear on the ulceration mark, and wash normally after removing the rust mark. If it is washed to rust, it must be rinsed clean.

2. After the clothes are stained with iron, they can be washed with 2% industrial oxalic acid solution in warm water at about 50 C and rinsed with clear water. After crushing into powder with vitamin C tablets, they are sprinkled on the stains of wet clothes, rubbed several times with water, and rust stains can also be removed.

3. If rust stains are old, the rust stains can be soaked in 10% oxalic acid, citric acid and water mixture, soaked in concentrated brine, and washed.

The rust of washing clothes with industrial oxalic acid is applied to the function that oxalic acid can remove rust. Generally strong acids can react with rust to achieve the purpose of rust removal. Note: Oxalic acid must be diluted.

How to Use Oxalic Acid to Clean Ceramic Tile Cement

1. Apply oxalic acid gently on the surface of ceramic tiles and evenly.

2. Place it for a while and react chemically.

3. Scraper shovel, clean ball rubbing, can be clean and clean.

4. You can also apply a little toothpaste on the scratches, wipe them repeatedly with soft dry cloth, wipe off the scratches, and then wax the floor to make the tiles shiny as new.

5. It can also be cleaned with clean water and detergent.

6. Wait until the cement is dry and soaked with grease, the cement will gradually lose its cohesion, and then clean the ball with a scraper shovel.

Keep in mind that oxalic acid is highly corrosive. Do not pour oxalic acid directly on the dirt because it is difficult to remove the dirt. Although the dirt is removed at once, ceramic tile cement is corroded. It must be diluted before it can be used and washed with clean water immediately. For those dirt that is difficult to remove, it may take a little effort to remove it, but in the long run, it will not corrode the tile.