Problem:
Inks are very difficult to get out of paper if they are absorbed. Many of the components are dyes and finely ground particulates. Their removal may need a multi stage approach to wash them from paper.
Method:
To test the best solvents for inked cards and paper I re-used the dried recipe card which had been through the water wash test and the 50% alcohol test. The inked paper was placed in a 100% acetone bath.
Image 1. Dried recipe card 'before' From left to right, blue permanent marker, black permanent marker, pencil, red pen, blue pen, black ballpoint pen, black ballpoint pen, pink highlighter, black ballpoint pen.
Image 2. Immediately upon immersion
Image 3. @15 minutes. Recipe card 'after' From left to right, blue permanent marker, black permanent marker, pencil, red pen, blue pen, black ballpoint pen, black ballpoint pen, pink highlighter, black ballpoint pen.
Image 4. @~4hours. Recipe card 'after' From left to right, blue permanent marker, black permanent marker, pencil, red pen, blue pen, black ballpoint pen, black ballpoint pen, pink highlighter, black ballpoint pen.
Results:
The immediate reaction removed a great deal of ink from the black felt marker, red ballpoint pen and blue ballpoint pen but had little to no effect on the pencil or black ballpoint.the blue felt marker lightened a bit but otherwise was unchanged.
The black felt marker also has subtle lines on the left side where it may have been a higher deposit of the ink. Also the slight browning indicates the possibility of iron in the ink. This indicates that it will be very difficult to remove. Likely with a rust removal chemical which would likely leave a residue.
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