Due to Capillary Action.
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Blotting paper is highly absorbent due to its porous structure, which allows it to draw in and hold liquids such as ink. As ink comes in contact with the blotting paper, its capillary action pulls the ink into its fibers, resulting in the ink being absorbed and transferred away from the surface it was on.
It is difficult to separate pen ink from paper without damaging the paper. One method is to try blotting the ink with a clean, dry cloth to absorb as much as possible. You can also try using solvents like rubbing alcohol or acetone, but be cautious as they can cause the ink to spread or the paper to deteriorate.
A drop of ink spreads on paper due to a combination of capillary action and absorption. The paper fibers pull the ink in through capillary action, while the ink is absorbed and spreads out across the paper surface. This process creates the characteristic spreading pattern of ink drops on paper.
Ink stains on paper are difficult to remove without damaging the paper. Try blotting the stain with a cloth dampened in water or rubbing alcohol. Be gentle to avoid tearing the paper. If the stain persists, it may be best to consult a professional conservator.
To remove black ink from just washed and still wet blue jeans, you can start by blotting the affected area with a clean cloth or paper towel to absorb as much ink as possible. Then apply some rubbing alcohol or stain remover directly onto the stain and gently rub it in. Rinse with cold water and repeat if necessary. Finally, launder the jeans as usual.
You can try blotting the stain with a paper towel to absorb excess ink, then apply a mixture of dish soap and water to the stain and gently scrub with a cloth. For tough stains, consider using rubbing alcohol or a commercial upholstery cleaner. Always test on a small, hidden area first to avoid damaging the fabric.