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Question
The amount of oil used in the varnishes are
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A.
Long oil contains 40 to 100 gal of oil per 100 lbs of resin.
B.
Medium oil contains 12 to 40 gal of oil per 100 lbs of resin
C.
Short oil contains 5 to 12 gal of oil per 100 lbs of resin. 
D.
All of the above
Answer ( Option D)

All of the above

Solution

CLASSIFICATION OF VARNISH ARE : 
Long oil varnish
1. Long oil contains 40 to 100 gal of oil per 100 lbs of resin.
2. Takes a longer time to dry
3. Moderate gloss
4. Marine and spar varnish belong to this group
5. Tung oil used is impervious to water
Medium oil varnish
1. Medium oil contains 12 to 40 gal of oil per 100 lbs of resin
2. They dry faster and become harder
3. Harder film than long-oil varnish but are not impervious to water
4. Floor varnish belongs to this group
Short oil resin 
1. Short oil contains 5 to 12 gal of oil per 100 lbs of resin. 
2. Dry rapidly forms a hard, brittle film that withstands much rough usage. 
3. Polishing varnish belongs to this group

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