clove oil

We are often asked about the use of clove oil to retard the drying of oil paint. Like many others, you may have heard that it darkens upon exposure to light. Clove oil works well as a retarder, but there is a note of caution: over time (a long time), it does darken as it dries. It starts off light but can eventually turn black. This is over the years and depends on the amount of direct light. We recommend using slower drying oils to retard drying—walnut or modified oil—instead of adding clove directly to paint...