If erasing the pencil mark from a textbook isn't effective, there are a few alternative methods you can try to remove the mark without damaging the book. Here are a few suggestions:
Using a kneaded eraser: Kneaded erasers are soft and pliable, making them effective at lifting pencil marks. Gently knead the eraser to soften it, then lightly dab or roll it over the pencil mark. The kneaded eraser can pick up the graphite without causing much damage to the paper.
Using a vinyl eraser: Vinyl erasers are also known as plastic erasers and are less abrasive than traditional rubber erasers. Lightly rub the vinyl eraser over the pencil mark, applying gentle pressure. Work in small, circular motions and be careful not to press too hard to avoid damaging the paper.
Trying a white vinyl eraser or art gum eraser: White vinyl erasers and art gum erasers are specifically designed for delicate surfaces and are less likely to leave marks or residue. Use them in the same manner as a regular vinyl eraser, gently rubbing the pencil mark until it lifts off.
Applying a clean, soft white eraser: If you don't have a vinyl eraser or kneaded eraser, try using a clean, soft white eraser. Ensure the eraser is clean and free from any graphite or dirt that could transfer to the textbook. Use gentle strokes to erase the mark, testing it on a less noticeable area first to ensure it doesn't damage the paper.
Dabbing with an art gum eraser residue: If the pencil mark is persistent, you can try lightly dabbing the area with an art gum eraser residue. This involves rubbing an art gum eraser on a piece of scrap paper until it leaves behind some residue. Then, using your finger or a soft cloth, lightly dab the residue over the pencil mark. This technique can help lift the mark without applying excessive pressure.
Remember to always work gently and test any eraser or method on a less noticeable area of the textbook before attempting to remove the pencil mark. Additionally, be aware that some erasers or aggressive rubbing can potentially damage delicate or glossy paper surfaces, so it's essential to exercise caution and proceed with care.