Artcare - B72 Retouching Gels
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Fast - Hard 25 Si Fast - Heavy 20 Slow - Heavy 20


Fast - Hard 25 Si. Fast - Heavy 20 and Slow - Heavy 20 B72 Retouching Gels are excellent media for painting impastos with bristle brushes and for painting with a spatula or palette knife.
 

Bristle brush impastos - Fast - Hard 25 Si - B72 Retouching Gel
Palette knife impastos - Fast - Hard 25 Si - B72 Retouching Gel

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Bristle brush impastos painted with Fast - Hard 25 Si B72 Retouching Gel

Palette knife impastos painted with Fast - Hard 25 Si B72 Retouching Gel

Fast - Hard 25 Si gel is recommended for painting extremely high impastos. Si included in the name of the gel indicates an addition of fumed silica in its composition, which provides an extra stiffness to the gel resulting in rich, crisp, well-defined textures. Bristle brushes are recommended for use with this medium.

Fast - Hard 25 Si
Impasto / Fast - Hard 25 Si - B72 Retouching Gel

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Fast - Heavy 20 and Slow - Heavy 20 gels give textures with soft, fluid edges. They can be mixed with Fast - Hard 25 Si in order to obtain a range of intermediate textural effects. Slow - Heavy 20 gel can be added to Fast gels in order to prolong their drying time, and especially to extend the open time available for working with Fast - Hard 25 Si gel. Paint for heavy impastos and textures should be rich in pigment in order to avoid shrinkage and subsequent cracking during the drying process.

Fast - Heavy 20 Slow - Heavy 20
Impasto / Fast - Heavy 20 - B72 Retouching Gels

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Light 10 and Very Light 7.5 gels should not be used for painting heavy textures. Having a false body made mainly of solvent they are comparable with the traditional megilp. The resulting heavy impastos will crack and be brittle.

Fast - Light 10 Slow - Light 10
Impasto / Fast - Light 10 & Slow - Light 10 - B72 Retouching Gels
Fast - Very Light 7.5 Impasto / Fast - Light 10 & Slow - Light 10 - B72 Retouching Gels

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Impasto painted with Fast - Light 10 gel

Caution / Very Slow - Light 10 - B72 Retouching GelVery Slow - Light 10 gel should not be mixed with other gels to paint impastos and rich textures, nor be applied in thick layers, because it dries very, very slowly.

Very Slow - Light 10

An Example of Painting with Impastos

Painting with B72 Retouching Gels Fast - Hard 25 Si
Fast - Heavy 20

The textural paint effect on the petals was accomplished by using Fast - Hard 25 Si and Fast - Heavy 20 gels. I used fast drying gels for painting because of the need of photographing every stage of underpainting, painting and glazing. In normal circumstances I would also use Slow - Heavy 20 gel as this allows the paint to be mixed more, giving a smoother transition between the colours.
The dark red, central part of the flower was painted with Fast - Light 10 gel.

Fast - Light 10
Impasto texture

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Paint strokes visible in raking light.

Ageing effect
Fast - Very Light 7.5

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Once the painting was sufficiently dry an artificial dirt layer was applied by glazing with Fast - Very Light 7.5 gel containing greenish raw umber.

Ageing effect - Detail

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