The absorption of ink by plotting paper involves:

1. The paper's surface characteristics: Plotting paper is typically coated with a layer that helps to absorb ink quickly and evenly. This coating is designed to prevent the ink from spreading or bleeding, resulting in sharp and clear lines.

2. The type of ink used: Different types of ink have different properties that affect how they are absorbed by paper. For example, water-based inks are absorbed more quickly than oil-based inks.

3. The thickness of the paper: Thicker paper will absorb ink differently than thinner paper. Thicker paper may require more time for the ink to fully absorb and dry, while thinner paper may absorb ink more quickly.

4. The amount of ink applied: The amount of ink applied to the paper will also affect how it is absorbed. Applying too much ink can cause it to pool or bleed, while applying too little ink may result in faint or incomplete lines.

5. The drying time: Allowing the ink to dry completely before handling the paper is important to prevent smudging or smearing. The absorption of ink by plotting paper is a delicate balance that requires the right combination of paper, ink, and technique to achieve the desired results.

Capillary action and adsorption