Category: Arts and Entertainment > Visual Arts
Asked by: rintrah-ga
List Price: $5.00
14 Dec 2005 14:21 PST
Expires: 13 Jan 2006 14:21 PST
Question ID: 605903
What are the pros and cons of using an oil medium or liquin instead of a traditional varnish on a finished oil painting?
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Re: Oil Painting
From: artness-ga on 16 Dec 2005 10:46 PST
With regards to using Liquin, the downside is that it cannot be removed with current known materials once dry. Varnish can be removed with mineral spirits and other oil solvents. Liquin dries slower than varnish resulting in the need to keep the painting flat for a few hours. This extended horizontal time may result in airborne particles settling onto the wet surface thereby trapping them in the Liquin. Varnish and Liquin both have this feature but varnish dries more rapidly allowing one to position the painting vertically quicker or surface the painting in a vertical position. The vertical position is problematic only to the extent that sags on the surface are possible when the varnish or Liquin is wet. If varnish is used it is considered good practice to apply it continously to the surface until it starts to become, "tacky" and thus will not run or sag. The good stuff is that Liquin is far easier to work with than varnish and produces less vapors. It also presents a dried surface that allows one to paint directly on top with no reactivation of the medium once it is dry. Liquin is an alkyd and tends to resist yellowing to a greater extent than varnish so say the makers. Liquin may also be thinned so as to create a reduced level of gloss. A mix of 50% mineral spirits with 50% Liquin produces a slightly semi gloss surface. Additional coats may be added once dry. This adds more gloss. The cardinal rule of varnish is that it be applied thin. Liquin also has a higher degree of resistence to water droplets should they get onto the surface once the Liquin has dried. Varnish easily spots from water creating milky areas that are difficult to remove. Liquin provides a very strong bond to oil paint and many use it during the painting process itself. Perhaps this is the major reason for its invention. It is suggested to be a very good medium for glazing and detail as it increases the flow properties of the oil paint.
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