Blog

Browse all Blog articles on the HUACANG Packaging blog.

Flexible packaging samples and food-contact compliance documents on an engineering desk

Oct 27, 2026

FDA Food-Contact Documents: A Buyer Checklist

A practical guide to the declarations, regulatory citations, specifications, supporting evidence, and conditions of use that US buyers should review when sourcing flexible food packaging.

Blog

Flexible packaging pouch beside laboratory equipment used to evaluate OTR and WVTR barrier performance

Oct 26, 2026

OTR and WVTR: A Flexible Packaging Barrier Guide

OTR measures oxygen movement through packaging, while WVTR measures water vapor movement. This guide explains how to interpret both values, compare test conditions, and write practical barrier requirements for flexible packaging RFQs.

Blog

FDA Food-Contact Documents: A Buyer Checklist

OTR and WVTR: A Flexible Packaging Barrier Guide

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