Product Description
Contemporary final picture varnish for the protection of oil and acrylic paintings. Imparts clarity and depth when applied to fully dried oil paint films. Unifies painting with an even optical reflection. Dries to gloss finish.
Product Code: 020
Constituents
Paraloid B67 Resin, Artists White Spirit.
Product Application
Langridge Gloss Varnish may be applied to fully dried oil and acrylic paintings as a final picture varnish. Lay the painting flat, face up, on a table.
Position it so you can see light reflected from its surface. Pour some varnish solution into a clean cup.
Load the varnish brush, then squeeze it against the inside of the container so that it holds a minimum of varnish. A dripping brush is too full! Begin application at one corner of the painting, brushing on the varnish in one direction across the whole painting. Work quickly so that the surface receives as thin and even coating as possible. Working quickly and deliberately, since the varnish will set quickly, proceed in a systematic way across the surface of the painting.
Check the work against the light from time to time to be sure all parts of the surface are receiving an equally thin coating. After the entire painting has been varnished, allow it to sit for about 10 minutes before removing it from the table, then lean the painting against a wall, face in, to finish drying. Dust in the air cannot settle on the surface of the painting leaning face in, but be careful not to stir up any dust on the floor in the vicinity of the painting. Discard any working varnish left in the cup. Working varnish should be considered contaminated and should not be returned to the stock bottle.
Langridge Gloss Varnish dries to a gloss finish. However, if a painting has major differences in gloss/matte reflection Gloss Varnish may not completely even these out. Langridge Gloss Varnish is made by dissolving Paraloid B67 Resin in Artists White Spirit to make a liquid. Brush or spray applied over paintings, the solvent will evaporate, leaving a thin, even coat of the resin.
Artists oil colours dry by absorbing oxygen. Oil paint drying generally takes a minimum of 6 months although it can take longer with extremely thick paint films (3mm or thicker). If needing a temporary protective varnish before full drying has taken place apply Retouch Varnish. For acrylic paintings, Artists should allow a minimum of 72 hours before applying a Langridge Gloss Varnish.
Additional Product Information
Function of a Picture Varnish
A varnish is used to protect finished artwork and add or reduce the reflective quality and optical depth of the finished dry oil painting. Langridge Gloss Varnish performs the following functions: . Fully removable without disturbing the oil paint film underneath.
. Resistant to moisture and general pollutants.
. Creates a complete film of even reflective quality.
It is the varnishes’ function to prevent dirt reaching the paint surface. It is much easier to remove a dirty varnish and replace that than to remove dirt from the painting itself, potentially damaging the paint film.
Reflective qualities of Langridge varnishes
Gloss dries to a highly reflective finish. Satin offers moderate reflection, similar to most matt varnishes. Matte is exceptionally flat.
The different finishes can be intermixed, or used sequentially.
Note: Satin and Matt varnishes will lighten dark value colours, which is typical of non-gloss varnishes.
Using varnishes as a constituent of glaze mediums
Because Langridge Gloss Varnish is formulated with Paraloid B67 Resin it is liable to easily re-solubilise when overpainted with mediums containing White Spirit or petrolleum distillates. It can, however, be used with care as the varnish component in oil glaze mediums to add luminosity to passages of oil colour.
A basic formula for making a glaze medium using Langridge Gloss Varnish is: 1 part each of Stand Oil, Artists White Spirit and Langridge Gloss Varnish. Mix together. Add cobalt driers, if desired, to accelerate the drying rate as Stand Oil is slow drying. Do not make glaze mediums using Langridge Gloss Varnish where the solvent content is not Artists White Spirit. Substituting with Gum Turpentine will lead to a slow drying oil film.
Overpainting a final picture varnish
As a general rule, Langridge does not recommend painting on top of a final picture varnish. It is likely that solvents in any medium applied onto the varnish will resolubilise the resin creating issues of uneven drying and awkward paint application as the resin becomes sticky. Langridge recommends removal of the picture varnish with its appropriate solvent. After the solvent has evaporated painting may be resumed. Be aware when adding fresh paint to a dry painting that fat over lean principles must still be adhered to.
Working properties
Thinning
Thin only with Artists White Spirit. Alternative solvents such as Gum Turpentine or Low Toxic Solvent are not compatible with Paraloid B67 Resin and can result in a non-drying varnish. Removal Remove the varnish using using Artist’s White Spirit.
Appearance
Langridge Gloss Varnish is a water-white (clear) liquid with characteristic White Spirit odour. The colour of the varnish will not effect the oil colours over which it is applied.
Clean Up
Clean brushes only with Artists White Spirit. 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 varnish. Wash thoroughly in warm water. Leave to fully dry before re-use.
Drying Times
30-60 minutes to touch dry. Any airflow over the surface will evaporate the solvent more rapidly which will reduce drying times.
Working Properties
Appearance
Langridge Solvent 75 is a clear and transparent liquid with no odour.
Clean Up
For further washing apply a small quantity of Langridge Safe-Clean-Up or Marseille or other pure olive oil soap and massage the bristles of the brush to release any remaining White Spirit. Wash thoroughly in warm water. Leave brushes to fully dry before using for oil colours.
Evaporation Times
10ml in 55mm wide open cup at 20ºC (68ºF) ambient temperature full evaporation after 3 hours. Any airflow over the surface will evaporate the solvent more rapidly.
Available in:
100ml (0431), 500ml (0435), Litre (043L), 4 Litre (0434)