Originally Posted by p

I found this online hope it helps
Cotton Fabric

Use peroxide on cotton and linen fabrics that have been scorched. Put some peroxide on a second piece of old fabric. Place the fabric over the scorched part of the clothing. Rub lightly with the heated iron. The peroxide will pull the scorch stain out, repeat the process as many times as needed to remove the scorch mark. If you have just scorched cotton fabric put it in cold water right away. Fresh scorch marks can come out by soaking the clothing in the cold water for 24 hours. Vinegar comes to the rescue too when treating newly created scorch marks. Rub the scorched area with white vinegar, then with cold water. Repeat until the scorch mark has vanished.

You can also cover the scorch mark on the clothing with lemon juice. Then lay it directly in the sun. The combination of the lemon juice and sunshine should bleach the mark out. This works best with white or light colored clothing. Dark fabrics might lose color along with the scorch marks.

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