Rochelle Salt for Silvering Mirrors from Canada
High-purity potassium sodium tartrate used in traditional mirror silvering solutions as reducing agent. Specifically named under HTS 2918.13.3000 as Rochelle salts, the double tartrate essential for depositing silver films. Supplied in moisture-proof containers.
Duty Rate — Canada → United States
10%
Rate breakdown
9903.05.2910%Section 301 (forced labor) — additional 10% ad valorem on products of Canada
Import Tips
• Provide reduction potential test results confirming reactivity for silver deposition
• Package in amber glass or HDPE with desiccants to prevent premature oxidation
• Include handling instructions warning against metal contamination during storage