Which statement about pigment molecules is accurate?

Which statement about pigment molecules is accurate?

• A. Small pigment molecules are mildly permanent and can come out easily with laser
• B. Large pigment molecules are mildly permanent and can come out easily with laser
• C. Titanium dioxide is the smallest pigment molecule
• D. Organic pigments are the most permanent

Answer: (A)

The main idea is how pigment molecule size relates to how permanent it is and how it responds to laser removal. In PMU pigments, smaller pigment molecules are less durable and break down more easily under laser energy. When the laser fragments pigment into tiny pieces, these fragments are then cleared by the body’s immune cells, so smaller molecules tend to be removed more readily. Larger pigment molecules tend to stay more intact and are harder to break apart, making them more persistent. Therefore, the statement that small pigment molecules are mildly permanent and can come out easily with laser fits this understanding: they’re not as permanently bound as larger pigments, and laser treatment can remove them more readily. The other options don’t align with how common pigments behave: titanium dioxide is a widely used pigment but not necessarily the smallest pigment molecule; organic pigments are generally less stable than typical inorganic pigments like iron oxides; and large pigment molecules are usually more resistant to laser, not easier to remove.

The main idea is how pigment molecule size relates to how permanent it is and how it responds to laser removal. In PMU pigments, smaller pigment molecules are less durable and break down more easily under laser energy. When the laser fragments pigment into tiny pieces, these fragments are then cleared by the body’s immune cells, so smaller molecules tend to be removed more readily. Larger pigment molecules tend to stay more intact and are harder to break apart, making them more persistent.

Therefore, the statement that small pigment molecules are mildly permanent and can come out easily with laser fits this understanding: they’re not as permanently bound as larger pigments, and laser treatment can remove them more readily. The other options don’t align with how common pigments behave: titanium dioxide is a widely used pigment but not necessarily the smallest pigment molecule; organic pigments are generally less stable than typical inorganic pigments like iron oxides; and large pigment molecules are usually more resistant to laser, not easier to remove.