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This information HAS errors and is made available WITHOUT ANY WARRANTY OF ANY KIND and without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. It is not permissible to be read by anyone who has ever met a lawyer or attorney. Use is confined to Engineers with more than 370 course hours of engineering.

Paint hardness



Type of coatings
Pencil Hardness
Catalyzed polyester 9H
Catalyzed polyurethane 9H
Catalyzed Modified
Acrylic polyurethane
4H
Catalyzed Acrylic
polyurethane
2H
Water-based polyurethane 3H
Water-based urethane/
Isocyanate Catalyst
2H
Conversion varnish 4H
Low VOC Catalyzed
laquer [24 hrs]
2H
Low VOC laquer 3H
Urethane/Nitrocellulose
laquer [24 hrs}
F
Water reducible laquer 2H
Tung oil/polyurethane
wipe-on finish
2H
Water-based polyurethane
wipe-on finish
HB-F
Aerosol precat 3B
Aerosol water clear acrylic 3B
Aerosol clear shellac 3B
Aerosol nitrocellulose/
polyurethane
HB
Aerosol nitrocellulose 3B
Amber (orange) Shellac
1 lb. cut
3B

Paint Primers


Types of primers

Varnish vs Lacquer vs Shellac

In the USA, varnish refers to an oil-based solvent finish with a variety of dissolved resins.

The term lacquer comes from the lac insect (Laccifer lacca) whose secretion, called lac, are a polymer that is soluble in alcohol. Shellac is a brittle or flaky secretion of the lac insect. (In the UK however, the term lacquer has a different meaning; if you spray it, it's lacquer - if you brush it, it's varnish!) In America today the word lacquer refers to nitrocellulose dissolved in alcohol or a different solvent.

Shelac is a different 'lac'; a brittle or flaky secretion of a different lac insect, Coccus lacca.

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