Sinking in

1. Sinking in is a phenomenon in oil painting where a painted area becomes dull, matte, or visually “dead” because the oil binder has been absorbed unevenly by the layer beneath it.

   When this happens, the color may appear weaker, darker, patchy, or less saturated than it did when first applied. The paint has not necessarily changed pigment; rather, the surface has lost part of the oil that gives oil paint its depth, gloss, and richness.

   Sinking in often occurs when paint is applied over a very absorbent ground, an underpainting with too much solvent, or a previous layer that has not been properly balanced in terms of oil content.

   • Visual effect: dull, matte, uneven, or sunken-looking passages.
   • Common cause: the lower layer absorbs oil from the fresh paint.
   • Common risk: loss of color depth, uneven gloss, and difficulty judging values accurately.
   • Typical correction: oiling out or applying an appropriate retouch varnish before continuing, depending on the stage of the painting.

   When this happens, the color may appear weaker, darker, patchy, or less saturated than it did when first applied. The paint has not necessarily changed pigment; rather, the surface has lost part of the oil that gives oil paint its depth, gloss, and richness.

   Sinking in often occurs when paint is applied over a very absorbent ground, an underpainting with too much solvent, or a previous layer that has not been properly balanced in terms of oil content.

   • Visual effect: dull, matte, uneven, or sunken-looking passages.
   • Common cause: the lower layer absorbs oil from the fresh paint.
   • Common risk: loss of color depth, uneven gloss, and difficulty judging values accurately.
   • Typical correction: oiling out or applying an appropriate retouch varnish before continuing, depending on the stage of the painting.

In oil painting, sinking in is especially important because artists often judge color, value, and edge quality by the appearance of the wet paint. If certain areas dry matte while others remain glossy, the painting can become visually confusing during the working process.

Sinking in is common in indirect painting, glazing, underpainting, and layered techniques. It is not always a disaster, but it must be understood. A sunken area can make a passage look incorrectly painted even when the actual color mixture was accurate.

Artists often address sinking in by lightly oiling out the affected area, which means applying a very thin layer of suitable oil or painting medium to temporarily restore the saturation before continuing. However, excessive oiling out should be avoided, because too much oil between layers can create weak adhesion, wrinkling, yellowing, or an overly slick surface.

• Sinking in is about oil absorption: the lower layer pulls oil out of the fresh paint.
• It changes appearance, not necessarily the pigment itself: the color may look duller even though the pigment remains present.
• Absorbent surfaces increase the risk: lean underpaintings, matte grounds, and solvent-heavy layers can encourage sinking in.
• Dark colors show it strongly: blacks, browns, deep reds, and shadow passages often reveal sinking in more dramatically.
• It affects judgment: a sunken passage may appear too light, too cool, or too weak, leading the artist to overcorrect.
• Correction should be thin and controlled: restoring the surface should not mean flooding the painting with oil.