What is a pound cut of shellac?

A "pound cut" is the traditional way of specifying shellac concentration. A 2-pound cut means 2 pounds of shellac flakes dissolved in 1 US gallon of denatured alcohol (methylated spirit). In metric, this is approximately 240g per litre.

Which pound cut should I use?

Use a 1-pound cut as a sealer or wash coat. Use a 2-pound cut for general French polishing and brushing. A 3-pound cut is suitable for padding on thick coats. Most French polishing uses 2-pound cut.

How long do shellac flakes take to dissolve?

Shellac flakes typically dissolve in methylated spirit within 24 hours with occasional stirring. Crushed or ground shellac dissolves faster. Strain through a fine filter before use to remove any undissolved particles.

How long does mixed shellac last?

Mixed shellac has a shelf life of about 6-12 months. After that, it may not dry properly. Always make up only what you need. Date-stamp your containers. Old shellac that stays tacky should be discarded.

WoodCalcs

Shellac Calculator — French Polish Ratios

Calculate shellac flake and methylated spirit ratios for French polishing.

Pound Cut

1-3 is typical

Volume Needed

How We Calculate This

A pound cut uses the ratio of pounds of shellac per US gallon of solvent.

Metric conversion

1 pound cut = 120g of shellac flakes per litre of methylated spirit. Multiply by the pound cut number for the desired concentration.

Flakes (g) = Pound cut × 120 × Volume (litres)

Frequently Asked Questions

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Last updated: February 2026

All calculations are estimates. Always verify measurements and material quantities before cutting or purchasing.