Colombia Upholds Anti-Dumping Duties on Chinese Acrylic Sheets

On April 28, 2026, Colombia’s Ministry of Commerce, Industry and Tourism issued Resolution No. 148, confirming the affirmative final determination in the first sunset review of anti-dumping duties on acrylic sheets (láminas de acrílico) originating from China. The ruling directly affects optical coating manufacturers and suppliers relying on Chinese-sourced acrylic substrates — widely used as low-cost test substrates and custom filter carriers — by raising tariff costs and tightening origin certification requirements.

Event Overview

On April 28, 2026, Colombia’s Ministry of Commerce, Industry and Tourism published Resolution No. 148, upholding anti-dumping duties on imported acrylic sheets from China following the first sunset review. The product scope covers flat acrylic sheets (HS code 3920.51), classified under Colombian tariff nomenclature as láminas de acrílico. The decision confirms the continued existence of injury to domestic producers and the likelihood of recurrence should duties be removed.

Industries Affected

Direct trading enterprises: Importers and distributors of Chinese acrylic sheets into Colombia now face higher landed costs due to renewed anti-dumping duties and stricter documentary compliance — including notarized certificates of origin and traceable supply chain declarations. Margin-based duty rates remain in force, with no de minimis exemption applied retroactively.

Raw material procurement entities: Optical coating labs, R&D centers, and small-volume filter developers that source acrylic substrates directly from Chinese suppliers must reassess procurement lead times, cost allocation models, and quality assurance protocols. The ruling elevates the operational weight of origin verification and increases administrative overhead for customs clearance.

Processing and manufacturing firms: Companies engaged in optical thin-film deposition, interference filter fabrication, or custom substrate polishing — especially those using acrylic as a non-critical but high-turnover base material — may experience margin compression or need to qualify alternative substrates (e.g., fused silica, BK7, or certified PMMA variants). Process validation cycles could extend if new substrates require recalibration of coating parameters.

Supply chain service providers: Customs brokers, trade compliance consultants, and logistics platforms serving the optics supply chain must update tariff classification guidance, audit documentation templates, and client advisories. Demand is rising for bilingual (Spanish–English) origin attestation support and SEMI/ISO-aligned quality statement review services.

Key Considerations and Response Measures

Review existing import contracts and Incoterms

Importers should assess whether current agreements allocate responsibility for anti-dumping duty payments, origin documentation, and post-clearance audits — particularly where FOB or EXW terms place compliance burden on the buyer.

Evaluate substrate substitution feasibility

Procurement teams should initiate technical benchmarking of alternative substrates (e.g., certified ISO 10110-compliant PMMA or domestically sourced acrylic) against optical performance, thermal stability, and coating adhesion metrics — not just cost.

Require formal quality and compliance declarations from Chinese suppliers

Optical buyers should request written statements — signed and stamped — confirming adherence to SEMI F21-0207 (for optical substrate specifications) and ISO 9001-certified production controls, alongside verifiable batch-level origin data.

Monitor Colombian customs enforcement trends

Recent notifications indicate increased scrutiny of ‘transshipment via third countries’ and inconsistencies between commercial invoices and packing lists. Firms should proactively align documentation across all shipment touchpoints.

Editorial Perspective / Industry Observation

Analysis shows this outcome reflects a broader regional trend: Latin American trade authorities are increasingly treating optical-grade polymer substrates not as generic plastics, but as functionally specialized industrial inputs — warranting targeted trade remedies. Observably, Colombia’s reliance on domestic acrylic production remains minimal (<5% market share), suggesting the policy prioritizes procedural deterrence over immediate industrial capacity building. From an industry perspective, the ruling is less about protecting local acrylic makers and more about establishing precedent for future reviews involving other precision polymer components (e.g., polycarbonate lenses, cyclic olefin copolymer films). Current more relevant concern lies in how quickly downstream optical integrators can adapt sourcing strategies without compromising qualification timelines for medical or aerospace applications.

Conclusion

This sunset review reaffirmation signals growing regulatory attention on mid-tier optical substrate supply chains — especially where cost-driven imports intersect with high-performance application requirements. It does not halt trade, but recalibrates its conditions: compliance is now a technical prerequisite, not just a customs formality. For global optical supply networks, the case serves as a timely reminder that substrate-level trade policy can cascade into process engineering, quality systems, and product certification pathways.

Source Attribution

Official source: Resolución 148 de 2026, Ministerio de Comercio, Industria y Turismo de Colombia (published April 28, 2026, Diario Oficial No. 50,219).
Additional reference: WTO Anti-Dumping Agreement Article 11.3; Colombian Decree 2131 of 2021 (Reglamento de Defensa Comercial).
Note: Duty rates, product scope details, and administrative appeal deadlines remain subject to official publication in the Boletín de Defensa Comercial; stakeholders are advised to monitor updates through Colombia’s National Directorate of Foreign Trade (DINATEX) portal.