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disposing of evidence?
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How do ink erasers/eradicators work?
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For more on marking an answer as the "Best Answer", please visit our FAQ.You may be thinking of a liquid which basically acts as a bleach. The ink is still there but its colour has been neutralised - a chemically knowledgeable individual could prove this by at least partly reversing the process, but most of the time very little trace will otherwise be visible (doesn't work on anything but white or at least very pale paper).
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