Can nitrocellulose lacquer be applied over existing oil-based paints?

No, the strong solvents in nitrocellulose will lift and wrinkle existing oil-based coatings. The surface must be stripped to bare wood.

What is the recommended moisture content of wood prior to finishing?

Wood should be properly seasoned to a moisture content not exceeding 15% to ensure good adhesion and prevent defects.

What are the major safety risks with nitrocellulose finishes?

The materials are extremely flammable. Smoking, sparking tools, and naked flames must be strictly prohibited, and application areas must be well-ventilated.

IS 4597

: 1968

Code of practice for finishing wood and wood-based products with nitrocellulose and cold-catalyzed materials

CurrentSpecializedCode of PracticeArchitectural · Building Construction Practices incl. Painting, Varnishing

Download PDF BIS Portal Google

This standard specifies the procedures for finishing wood and wood-based products using nitrocellulose and cold-catalyzed materials, detailing surface preparation, application techniques, and critical safety protocols.

Code of practice for finishing wood and wood-based products with nitrocellulose and cold-catalyzed materials

Quick Reference Values

max wood moisture content15%

typical drying time nc sealer1 to 2 hours

sanding grit between coats320 to 400 grit

Practical Notes

Ensure adequate exhaust and ventilation when applying nitrocellulose finishes due to highly volatile, flammable solvents and toxic fumes.

Wood must be properly seasoned and completely dry before application to prevent blushing or poor adhesion.

NC lacquers contain strong solvents that can lift or wrinkle underlying oil-based paints or varnishes; ensure complete removal of incompatible old finishes before re-coating.