Earlier, when students in the school wrote fountain pens, which had to make their own special ink, the children removed their blots and invalid entries in the notebooks is a very dangerous method.

It consisted of the following: a small amount of powdered bleach mixed with a small amount of water. The mixture pupil with a brush treated with fixed entry, before placing a clean sheet of paper under a school notebook. Gradually the ink began to disappear. Then it was necessary to wet processed local blotter. However, this method has a few nuances. First, using this method you can remove ink from paper, which are designed for fountain pens, not ballpoint. Second, this method allows you to delete records only from white paper. On colored paper will remain white spots.

Now there are more effective and less dangerous for the human health method. To delete unnecessary records from paper you'll need: approx 1 tablespoon 70% vinegar, a bit of potassium permanganate (pinch). To prepare the solution you need to mix all the ingredients.

For use under sheet, on which ink will be removed, placed a blank sheet of paper. Applying for dare, you can use a small brush with fine and thin hair, then the result will be more effective. Moistened with a brush should hold a correction until the error disappears. In the treated place will be a brown tinge, from which you can remove with cotton wool pre-soaked in hydrogen peroxide. Wet paper can be dried with a warm iron.

This method is effective to remove the errors with fine paper to get rid of the labels on thick paper, you need to use cotton swabs.

This method gives good results, however, it is not the only one. To prepare similar mixes mix 10 grams of oxalic acid and 10 grams of citric acid with 100 milliliters of water. Moisten the entry to a few times. Then the treated area moistened with water and dried.

Another effective composition is made from 10 grams of hydrochloric acid 10 grams sodium chloride and 30 milliliters of water.