Binder (in paint)

What is binder

Gesso is a common acrylic binder for homemade paint.

What is binder in paint?

Binder refers to substances that hold the particles of pigment together in a paint substance. All paint includes a binder of some sort, as the binder is what keeps the pigment in place after the paint dries. Sometimes the term is used interchangeably with vehicle, although this is technically incorrect, as the binder is merely part of the vehicle component of a paint. In oil paints, the binder constitutes the whole vehicle, whereas acrylics may have up to 10 components of the vehicle, of which the binder is only one.

Generally, acrylic painting mediums include a synthetic binder designed to form a film after water has evaporated. Meanwhile, oil painting workshops will tell you that oils use organic binders, traditionally linseed oil. As for watercolor painting, that requires paints that use gum arabic as a binder.

See also: egg tempera

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