Acuarela es cualquier pintura que sea a base de agua. Los ingredientes principales de la acuarela son pigmentos de origen vegetal, mineral o animal, amasados y aglutinados con agua y goma arábiga.



Los Pigmentos:



En acuarela, conocer bien los pigmentos es lo más importante. Como la acuarela usualmente se pinta sobre papel es muy importante pensar en la fugacidad de los pigmentos, no ayuda la gran selección que existe hoy en día. La exposición a la luz debe ser tomada en cuenta al escoger los pigmentos para pintar en acuarela. La pintura de acuarela no tiene la protección de las emulsiones en el óleo y acrílico.

Muchos pigmentos son razonablemente duraderos cuando se usan sin diluir. La acuarela, por supuesto es aplicada en capas diluidas o veladuras. Esto expone el pigmento a más radiación y puede arruinar una pintura. Los pigmentos para una paleta básica:

Amarillo de CadmioPY 37

Azul de Prussia o Thalo PB 2

Lemon Yellow PY3

Prussian Blue PB 15

Amarillo Ocre PY43

Viridiano PG 18

Rojo de Cadmio PR 108

Verde Phtalo PG7

Rojo Escarlata PR 188

Verde Oxido de Cromo PG 17

Rojo Quinacridón PV19 ,

PR 192 Siena Natural PBr7

Violeta Quinacridón PV 19

Siena Tostado PBr 7 Azul

Ultramarino PB 29

Tierra de Sombra PBR 7

Azul Cerúleo PB 35


En 1977 la ASTM (Sociedad American de Pruebas y Materiales) realizó guias de etiquetas requeridas para la venta de materiales: Categoría I (excelente) o Categoría II (muy buena)





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Watercolor is any paint that is water-based as opposed to being oil-based. The essential ingredients of watercolors are pigments, a binding agent (usually gum arabic), and water. When combined these three components create transparent watercolor.



The pigments



In watercolor painting to know your pigments is an essential part of painting. Since watercolor is usually painted on paper, and nowadays there is a wide array of colors on offer, its hard to know what to buy. Exposure to light is the major concern as it can cause change over a wide selection of hues.

Watercolors are at most risk as they do not have the protection of the binder enjoyed by pigments bound in oil or acrylic. Many pigments are reasonably lightfast at full strength but fade when in a tint. Watercolors , of course are usually applied in thin films. This exposes the pigment to increased radiation and leads to damage to the color. List of pigments for a basic palette: In 1977 the ASTM (American Society of Testing and Materials) developed standards with new and explicit labeling requirements: Category I (excellent lightfastness) or Category II (very good lightfastness).

IMPORTANT INFORMATION Please take Aureolin off your list of pigments, in the past five monts I put some swatches of colors exposed to direct sunlight and Aureolin, Windsor and Newton changed drastically. I have been using this transparent yellow for years and was shocked at the results of my test.

Cobalt Blue PB 28

Yellow Cadmium PY 37

Phthalocyanine Blue PB 2

Lemon Yellow PY3

Prussian Blue PB 15

Yellow Ochre PY 43

Viridian PG 18

Cadmium Red PR 108

Phthalocyanine Green PG 7

Scarlet Red PR 188

Chromium Oxide Green PG 17

Quinachridon Red PV 19 , PR 192

Raw Sienna PBr7

Quinachridon Violet PV 19

Burnt Sienna PBr 7

Ultramarine Blue PB 29

Raw Umber PBR 7

Cerulean Blue PB 35

Depending on the manufacturer these are considered Category I and II and the best selection of pigments for watercolor painting.