The drying process of oil paints can take several weeks to months or years. Why does it take so much longer than, for example, the drying of watercolor paints? The video explains.

Reference

• Charles S. Tumosa, Marion F. Mecklenburg, Oil Paints: The Chemistry of Drying Oils and the Potential for Solvent Disruption, Smithsonian Contributions to Museum Conservation 2012, 3, 51–58.
  

 
Also of Interest

• Collection: Chemistry & Art
  A compilation of articles on chemistry in artworks, on art inspired by chemistry, about the work of scientific teams in museums
• To Tattoo or Not to Tattoo?,
  Tattooing from a chemical point of view
  Henrik Petersen, Klaus Roth
  ChemistryViews 2016. https://doi.org/10.1002/chemv.201600106
• The Electromagnetic Spectrum, https://doi.org/10.1002/chemv.201300108
• The Chemistry of Fireworks, https://doi.org/10.1002/chemv.201400134