What is the general drying rate for oil paint?

The drying rate for oil paint can vary significantly depending on various factors such as the thickness of the application, environmental conditions like temperature and humidity, and the specific formulation of the paint used. Generally, oil paints are known for their slow drying time, which is why the range of 2 to 20 days is the most accurate answer.

This extended drying period allows artists to manipulate and blend the paint over a longer time frame, which is beneficial for techniques such as glazing. Thinner applications may dry more quickly, while thicker layers can take longer than the upper limit indicated.

In contrast, the other options tend to suggest drying periods that are either too short or too narrow, not fully capturing the variability in drying times that artists commonly experience. Hence, the selection of 2-20 days reflects a more comprehensive understanding of the typical behavior of oil paint in practical use.