news — from the mill.
Production notes, industry updates, and a little colour on what we’re making this month.
PPGI Export Packaging Standards for Seaworthy Shipments
The standard packaging requirement for exporting PPGI coils to prevent sea freight damage is a layered, seaworthy pack that keeps moisture away from the coil, holds the coil rigid inside the container, and survives multiple handlings between the coating line and the buyer’s decoiler. In practice that means an inner wrap, a metallic or heavy-duty […]
Read →PPGI Coil Edge Damage: How to Inspect, Document, and File a Claim
If your PPGI coil arrives with edge damage, the correct sequence is: stop unloading or further handling, photograph and video the coil in place before anything is moved, record the damage on the delivery receipt or carrier document, notify the supplier and freight forwarder in writing within the notice period stated in your contract, and […]
Read →PPGI Pencil Hardness Test: A Quick Check for Coating Durability
The pencil hardness test on PPGI (prepainted galvanized iron) is performed by drawing pencils of increasing hardness across the cured paint film at a fixed angle and load, then inspecting the coating for scratches or film removal to identify the hardest pencil that does not damage it. The result is reported as a grade on […]
Read →PPGI T-Bend Test Explained for Coil Buyers
A T-bend rating tells you the tightest 180° fold a prepainted galvanized (PPGI) test strip can survive without the paint coating cracking or flaking, expressed as a multiple of sheet thickness: 0T is a fold with no gap, 1T folds the strip back on itself with one thickness of material in the bend, 2T leaves […]
Read →PPGI Color Fade Warranty: What to Expect
A realistic PPGI color fade warranty is usually a limited, pro-rata or stepped guarantee against excessive chalking and color change on the painted face of the coil, typically measured against a defined standard and expressed in years from delivery or installation — not a promise that the roof will look new for that period. Most […]
Read →The Hidden Layer: Why PPGI Backing Paint Determines Coil Lifespan
When procurement managers and roll formers evaluate prepainted galvanized steel (PPGI), the conversation almost always centers on the topcoat: its color, gloss, or PVDF resin. Yet the reverse side—the backing paint, or back coat—often dictates whether a coil survives its intended service life or fails prematurely from corrosion, delamination, or adhesion loss. In simple terms, […]
Read →PPGI Coil for High UV Exposure: Choosing Paint That Won’t Fade
For a project in a high-UV, hot climate, polyvinylidene fluoride (PVDF) is the most reliable paint system to prevent fading and chalking, followed by high-durability polyester (HDP). Standard polyester (PE) will typically fail aesthetically long before its structural life ends in such environments. This article explains the technical differences between these systems so you can […]
Read →
PPGI vs PPGL: A Head-to-Head Corrosion Resistance Comparison
When procurement managers and engineers ask which is more corrosion-resistant—PPGI or PPGL—the accurate answer is conditional: PPGL (prepainted Galvalume) generally outperforms PPGI (prepainted Galvalume) in cut-edge and scratch-damaged corrosion resistance, while PPGI (prepainted galvanized) can offer superior performance in specific chemically aggressive environments. The substrate metal, not merely the top paint, dictates long-term behavior once […]
Read →PPGI T-Bend and Impact Tests: What They Measure and How to Pass Them
If you are a roll former or roofing-sheet producer, the two most common questions we hear are: “Will the paint crack when I bend it?” and “Will the paint chip when the sheet is hit?” The answers come from two specific laboratory tests: the T-bend test and the impact resistance test. To ensure your paint […]
Read →PPGI Coil for Southeast Asia: High-Humidity Specification Guide
For roofing in Southeast Asia’s high humidity and rainy season, the most important PPGI coil specification is not the paint color—it is the metallic coating mass, the paint system’s barrier properties, and the edge protection strategy. A coil with a low zinc coating weight or a thin polyester topcoat will fail prematurely in tropical coastal […]
Read →