Fresh Paint Smell

Have you noticed freshly painted rooms and furniture have a distinctive smell that goes off after a few days ? Do you know why ?

Here is how it works. Paint as sold in shops has 3 main ingredients. A Binder, a solvent and a pigment. Out-of-the-can paint is usually very thick and difficult to apply to surfaces. So a liquid thinner is added to make the paint easier to spread (or less viscous , technically speaking)

The thinner (also commonly known as mineral turpentine) is usually a mixture of hydrocarbons such as Aliphatic and Alicyclic C7 to C12 hydrocarbons , toluene, benzene , ketones etc. These are derived from petroleum crude oil (in a way similar to petrol/ diesel production). Similar to petrol/ diesel , thinner is a volatile substance. Once the paint (with thinner) has been applied, the thinner slowly evaporates leaving behind only the paint. The evaporation may take from a few days to a month or more (depending on the specific ingredients of the thinner). The “fresh paint smell” is the smell of the evaporating thinner. Once the evaporation is complete , the paint film becomes dry and the process is complete, the smell also fades away.