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  2. Acrylic retarder - Wikipedia

    en.wikipedia.org/wiki/Acrylic_retarder

    When used correctly, they can keep the paint wet from half an hour extra to a full day's working time. Applying too much retardant, however, can prevent a layer from drying correctly for as long as the retardant is present, causing future damage to the painting unless the affected layer of paint is removed or re-mixed.

  3. Drying oil - Wikipedia

    en.wikipedia.org/wiki/Drying_oil

    A drying oil is an oil that hardens to a tough, solid film after a period of exposure to air, at room temperature. The oil hardens through a chemical reaction in which the components crosslink (and hence, polymerize ) by the action of oxygen (not through the evaporation of water or other solvents ).

  4. Conservation and restoration of paintings - Wikipedia

    en.wikipedia.org/wiki/Conservation_and...

    Oil paint is a medium made up of pigments and a drying oil binding agent. Various other ingredients can be mixed in to condition the paint in several ways and modify its various properties and drying. [1] Oil paintings are painted on various surface support types. Oil on canvas, oil on board, and oil on metal are only some examples of oil ...

  5. Oil drying agent - Wikipedia

    en.wikipedia.org/wiki/Oil_drying_agent

    An oil drying agent, also known as siccative, is a coordination compound that accelerates the hardening of drying oils, often as they are used in oil-based paints.This so-called "drying" (actually a chemical reaction that produces an organic plastic) occurs through free-radical chemical crosslinking of the oils.

  6. Conservation and restoration of panel paintings - Wikipedia

    en.wikipedia.org/wiki/Conservation_and...

    A Relative Humidity over 65% can lead to mold growth and dry rot. [5] Panel paintings are subjected to various environmental conditions during exhibition. Regulating temperature, relative humidity, light intensity and duration of exposure, and atmospheric pollutants are essential factors in painting conservation.

  7. Is It Safe to Use Expired Vitamins? The Truth About Vitamin ...

    www.aol.com/vitamins-expire-nutritionists-weigh...

    When you buy a bottle of vitamins from a nutrition store, you’ll probably notice a best-by date on the bottom of the jar. But that inscribed number isn’t a hard-and-fast rule—there is some ...

  8. Fat over lean - Wikipedia

    en.wikipedia.org/wiki/Fat_over_lean

    Oil paint dries at different rates due to the differing drying properties of the constituent pigment. However, everything else being equal, the higher the oil to pigment ratio, the longer the oil binder will take to oxidize, and the more flexible the paint film will be.

  9. Glaze (painting technique) - Wikipedia

    en.wikipedia.org/wiki/Glaze_(painting_technique)

    The medium, base, or vehicle is the mixture to which the dry pigment is added. Different media can increase or decrease the rate at which oil paints dry. Often, because a paint is too opaque, painters will add a medium like linseed oil or alkyd to the paint to make them more transparent and pliable for the purposes of glazing.

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