Available in 60ml and 250ml
A traditional varnish: which has been in use for centuries by generations of artists. The varnish is made from mastic resin which is produced by the pistachio tree. The main source is the Greek island of Chios. The basic resin comes in the form of clear drops which are clear when fresh and which have a tendency to yellow with age. The resin dissolves in alcohol or gum turpentine and forms a varnish that is easy to work with. The main drawback is a tendency to bloom and or darken and yellow with age. As a result dammar is the preference of most artists. When making mastic it is essential to do so in a warm dry environment as the ingress of moisture will cause blooming. The medium can be added to oil in a ratio of about 10% and results in a paint finish which is glossy and almost enamel in appearance. Roberson’s Mastic Varnishes are available in four grades of consistency to suit the various applications. The varnish is very easy to make by following the same procedure as dammar varnish. The resulting varnish is easy to brush to a smooth film, and is easy to remove. Mainly used by restorers, surely one of the best recommendations of all. Mastic is very much in this category.
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