Velázquez Medium is an oil painting medium of finely ground calcite in bodied linseed oil. Use it to extend paint and alter its consistency, making oil colors 'long'* for finer detail and impastos. Softer than Impasto Medium, this flowing paste makes colors slightly transparent while allowing you to build impasted, thick applications of paint. When added to oil paint it does not alter the color temperature. It can be thinned with solvent or oil. Depending upon the proportion added to paint, it does not affect the drying time significantly.
Velázquez Medium does not contain stearates, solvents, driers or natural or synthetic resins, so it is safe to add to oil paint without the worry of cracking or delaminating.
*Long refers to the consistency of paint that displays tall peaks when a palette knife is pressed to its surface and lifted. Long paint is also described as being a "ropy" and refers to a stringy quality, like that of honey. Paint that behaves in this way is said to have long rheology. Short rheology refers to paint that exhibits a more buttery consistency, typical of most commercial oil paint. Rheology is the study of how substances flow, such as liquids and soft solids that flow rather than deform elastically.
Velázquez Medium is a calcite-rich oil-painting medium.
The soft white paste has little affect on color, making them less opaque and slightly less saturated. Use it to build thick applications of paint.
Comparison of Impasto Medium (top left) and Velázquez Medium (top right) shows the different handling characteristics added to paint.
Velázquez Medium slightly increases the transparency of colors while introducing flowout and leveling. These properties allow you to create fine detail in impasto or thick paint with ease. Although the paint becomes long when Velázquez Medium is added, it holds brushstrokes well. In the above example, when added to green earth artist oil (bottom center), the mixture of Impasto Medium (bottom left) extends the color and its consistency, while the mixture with Velázquez Medium (bottom right) gives the paint a long, ropy consistency.
Mix Velázquez Medium directly into your paint right on the palette.
Velázquez Medium is a great way to add calcite to your own paint. Add Velázquez Medium and linseed oil directly to pigment powder until a stiff paste is obtained (almost the consistency of putty). Grind the paste with a muller on a flat surface before storing in collapsible tube. Some of its properties will be temporarily lost when grinding Velázquez Medium with a muller, but should be restored when allowed to stand.