What can be considered positive density marks on film?

Positive density marks on film are areas that appear darker than the surrounding film due to increased exposure. In this context, static artifacts are relevant because they often create dark spots or streaks on the film, which can manifest during the imaging process when static electricity causes dust or other debris to stick to the film or the imaging receptor. These artifacts result in increased density in the affected areas, leading to a visible mark.

While fingerprints and product tags can also impact film quality, they generally do not contribute to the positive density effect in the same way that static artifacts do. Fingerprints may create smudges or blurry areas, and product tags typically come off during the processing but do not inherently lead to density differences. Thus, it is the presence of static artifacts that aligns with the definition of positive density marks.