For what purpose is painter's tape used?

Painter's tape is primarily used to create clean lines and protect surfaces from paint splatter, making it an essential tool for any painting project. When applied correctly, it adheres to surfaces and creates a barrier that prevents paint from bleeding onto adjoining areas, such as trim, ceilings, or adjacent walls. This ensures that when the tape is removed after the painting process, sharp, clean edges are revealed, enhancing the overall appearance of the job.

The other options do not accurately reflect the primary function of painter's tape. While drying time is influenced by various factors, including the type of paint used and environmental conditions, painter's tape is not designed to affect this process. Mixing paint colors is best done through proper techniques and tools, rather than using tape. Lastly, measuring paint quantities requires calibrated tools like measuring cups or scales, and tape does not serve this purpose. Thus, the correct answer highlights the specific and vital role of painter's tape in achieving professional-quality finishes in painting projects.