Find it. Buy it.
Two places. One does discovery. The other does the deal. Together they cover everything from the first Google search to the loaded container leaving the mill.
worldpaperindex.com, this site
Free, editorial, Google-indexable. A proper reference for every paper grade, mill, and brand, specs, history, where it's made, what it's used for. News, guides, side-by-side comparisons.
Search-first. Most visitors arrive from Google, find the grade they were researching, and see live availability from the marketplace right on the page.
b2bpaper.com, the marketplace
Where the deal happens. A B2B surplus marketplace for paper mills: buyers post requirements, mills post surplus lots, the platform matches them, logistics are container-optimised. 350+ verified buyers across 40+ countries.
Every grade page on this site links straight into the buy flow. Closed-deal prices (anonymised, aggregated) flow back into this site as market-price panels, each loop makes the next loop more useful.
Where the numbers come from
Three tiers of ingestion feed the canonical graph at wpi-api.xdvu.com. Public records (mill registries, trade-body filings, certification issuer databases) anchor every entity with a verifiable primary source. Editorial research, writers with industry backgrounds cross-checking, calling mills, reconciling conflicting specifications, fills gaps and corrects legacy data. No single tier is sufficient on its own: public records go stale, editorial capacity is finite, and first-party submissions need independent corroboration.
The third tier is structured collaboration: mills and converters contribute first-party data (grades produced, certifications held, contact details) through the contribute flow on every mill page. Every row carries a provenance tag, source, confidence, status, so a reader can tell at a glance whether a number came from an FSC certificate scan, a trade magazine, or a mill sales rep. Conflicting values surface as a dispute flag rather than silently overwriting the prior record.
How the index stays current
Permanence is the contract. Every mill, grade, and certification has a permanent WPI ID (WPI-m-*, WPI-g-*, WPI-c-*) that never moves. When an entity is renamed, merged, or split, the old ID redirects but is never deleted, citations made today still resolve in ten years.
Updates are continuous for public-source data and quarterly for editorial review. A completeness gate scores every page before publication, titles, descriptions, canonicals, spec ranges, source traceability, and pages that drop below threshold get noindex until fixed rather than shipping thin content. That gate is why the index grows more slowly than a wiki but stays more reliable than a directory. Readers can flag anything through the contribute CTA on every entity page; corrections are triaged weekly.
The flywheel
Google sends buyers looking for a specific grade. We show them the grade page and the live availability. They click through to B2BPaper to transact. Closed-deal data flows back as price panels. Each round makes the next round stronger, more traffic means more deals, more deals means better price signals, better price signals means more traffic.