news — from the mill.
Production notes, industry updates, and a little colour on what we’re making this month.
PPGI Coil Packaging for Sea Freight: A Buyer’s Guide
To prevent edge damage and white rust during a long sea shipment, PPGI coil should be packed as a sealed, moisture-managed unit: the coil wrapped in VCI paper against the steel surface, covered with waterproof VCI film, fitted with edge protectors, secured to a wooden pallet or saddle with steel strapping through the eye or […]
Read →PPGI Coil Claim Handling and Evidence That Works
If your PPGI coil arrives with paint or dimensional problems, the evidence you need is a documented chain: the mill test certificate and your purchase specification, retained samples from the approved lot, container and seal photos taken before opening, unloading records with timestamps, inspection and test data measured against agreed tolerances, and a clear timeline […]
Read →PPGI Coil Inspection Before Shipment: Tests and Criteria
Before shipment, a PPGI coil should be checked with a documented plan: sampling frequency agreed in the contract, coating mass or thickness verification, dry film thickness readings on both faces, T-bend and impact adhesion tests, MEK solvent rub, gloss meter reading, color Delta E measurement, coil weight and dimension checks, and an eye-to-sky visual inspection […]
Read →How to Choose a PPGI Supplier: Verifiable Capability
To choose a reliable PPGI supplier when every website claims to be a leading manufacturer, stop evaluating claims and start evaluating verifiable capability: what coating line the supplier actually operates, where the substrate comes from, which paint system is used, what test reports can be produced, which references can be checked, and how the supplier […]
Read →PPGI Coil Defects: Causes and Prevention Guide
The most common defects in prepainted galvanized steel coil are color deviation, orange peel, blistering, edge paint loss, coil break, and zinc flaking. Each has a different root cause — some originate in the paint line, some in the galvanizing line, and some in handling or storage — and each can be caught before shipment […]
Read →PPGI Coil Total Landed Cost: How to Compare Offers
To compare PPGI coil offers when FOB prices look similar, convert every offer into a total landed cost per metric ton at your receiving point: base steel and coating specification, coil weight and container loading efficiency, freight and surcharges, duties and port charges, inspection and testing, expected rework or rejection risk, and the cash cost […]
Read →PPGI Coil Specification Sheet Fields for a Precise RFQ
To get a supplier to quote exactly what you need instead of a generic offer, your PPGI coil inquiry must state the full specification chain: substrate grade and thickness, zinc or zinc-alloy coating mass, paint system chemistry, top and back coat thickness, RAL or custom color, gloss level, coil inner and outer diameter, coil weight […]
Read →PPGI Zinc Coating Mass vs Paint Adhesion Explained
Paint peeling or flaking on prepainted galvanized coil usually means the failure is at an interface, not in the zinc coating weight itself. A coil can meet its Z or AZ designation and still delaminate if the surface was under-pretreated, over-pretreated, contaminated, or passivated in a way the paint system cannot tolerate. Zinc coating mass […]
Read →PPGI Coil Supplier Audit: 15-Point Factory Checklist
When auditing a PPGI coil factory, verify five control layers in order: substrate and metallic coating identity, paint system records, line process control, inspection and traceability, then supply and documentation reliability. A plant can look busy and still ship inconsistent coils if any layer is unverified. This checklist is written for first-time buyers placing a […]
Read →PPGI Coil Gloss Level: Choosing 30%, 70% or Custom
For most building panels, the practical answer is this: choose a matte-to-satin finish around 30% gloss at 60° when you want to reduce glare, hide surface waviness and fingerprints, and accept slightly lower reflectivity; choose a semi-gloss finish around 70% gloss at 60° when you want a brighter, more saturated colour and a more reflective […]
Read →