PRODUCT INFORMATION SHEET

underpainting medium

Product Description

Lean medium used for the ‘first-sketch’ in oil painting. Low oil content for rapid drying, minimises chances of cracking when overpainting with full strength colours.

Product Code: 008

Constituents: Stand Oil (40 Poise), Distilled Gum Turpentine, Alkali Refined Linseed Oil, Cobalt Drier.

Product Application

Langridge Underpainting Medium is highly fluid, yet contains the correct percentage of oil to bind colours with which it is mixed. This affords the artist complete security in adding large volumes of medium without the fear of underbinding the paint.A film of 100% Underpainting Medium will dry to a stable, non-yellowing, non-reversable layer.

Underpainting Medium may be added to oil colours in quantities at the discretion of the artist.Initially small additions will purely aid the flow qualities of existing oil colours.As more medium is added to the oil colour so the opacity of the resulting paint will be reduced.

Techniques such as a watercolour style ‘wash’ effect can be achieved without losing richness and vibrancy. Diluting purely with solvents such as Gum Turpentine can easily underbind paint and lead to a dull, dry lifeless film with potential for dusting or flaking off.

After 15 minutes of applying Langridge Underpainting Medium the surface will set-up to a soft tack that lightly grabs any succeeding brush strokes. Underpainting Medium stays wet for a much shorter period than Painting Medium and is best employed for successive layering rather than a wet-in-wet technique.The Stand Oil base ensures pale colours stay bright whilst deep tones are enriched.

Langridge Underpainting Medium has a low oil content and, as such, is a ‘lean’ medium. It should not to be used for overpainting very fat or slow drying layers of paint.

ADDITIONAL PRODUCT INFORMATION

Altering the reflective finish.

The addition of Wax Painting Paste to Painting Medium can reduce the gloss finish normally associated with an oil paint medium. Mix together 1 part Wax Painting Paste to 8 parts Underpainting Medium for a matt finish. A higher proportion of wax medium may be added for extra matte effects.The addition of Wax Painting Paste will give more body to the medium, so the artists technique should allow for this in application.

Sealing timber and other non-flexible supports

Where an absorbant non-flexible support such as wood or composite timber product (e.g. MDF) needs a penetrative sealant, Underpainting Medium can be applied by brush or rag as a thin layer. Allow to fully dry before application of paint on top.

WORKING PROPERTIES

Thinning
For best results thin with Distilled Gum Turpentine. However, Artists White Spirit or Langridge Low Toxic Solvent may be substituted. The use of the latter solvents will tend to reduce the fatness of stroke and the oil film will dry with less richness due to the partial destruction of the paint film.

Appearance
Langridge Underpainting Medium is a pale amber colour liquid with characteristic turpentine odour. Very fresh medium may exhibit a green cast.
The colour of the oil will slightly effect the oil colours with which it is mixed.

Clean Up
Clean brushes with any artists’ solvent (eg Gum Turpentine, Low Toxic Solvent, etc.). For further washing apply a small quantity of Marseille or other pure olive oil soap and massage the bristles of the brush to release any remaining colour. Wash thoroughly in warm water. Leave to fully dry before using for oil colours.

Drying Times
12-24 hours to touch dry.
Full film drying 3-6 months

Available in:
100ml (0081), 500ml (0085), Litre (008L), 4 Litre (0084)