Uncoated Woodfree Paper

Overview

Uncoated woodfree paper is a broad category of printing and writing papers made from chemical (kraft) pulp rather than mechanical pulp. The term "woodfree" is misleading -- it does not mean the paper contains no wood. Rather, it means the paper is free of mechanically ground wood pulp (groundwood), using only chemically processed pulp where the lignin has been removed. This gives the paper better aging properties, higher brightness, and superior printability compared to wood-containing (groundwood) papers.

While the PRD focuses primarily on corrugated packaging papers (wiki/entities/kraftliner, wiki/entities/testliner, wiki/entities/fluting) and board grades, uncoated woodfree represents an important adjacent category in the broader paper surplus market.

Technical Characteristics

Relationship to PRD Paper Types

The PRD's paper type enum does not include a dedicated uncoated_woodfree type. The closest categories in the system are:

• MG Kraft (40-120 GSM): Machine-glazed kraft used for wrapping and interleaving, which overlaps in GSM range
• Greaseproof (30-80 GSM): Specialty paper with different properties but similar weight range

For the marketplace to handle UWF surplus, it would either:

1. Be classified under an expanded paper type enum (future enhancement)
2. Be handled as a custom product type within the existing Product entity framework, which supports free-form name fields alongside the structured paper_type enum

Market Context

Uncoated woodfree paper is one of the largest segments of the global paper market by value, but it is declining due to digitization:

• Office paper demand has been falling 2-5% annually in developed markets
• Book printing remains stable
• Commercial printing (brochures, manuals) is declining
• These trends create surplus as mills overproduce relative to shrinking demand

Surplus Characteristics

UWF surplus differs from corrugated packaging surplus:

• Often available in sheet/ream form rather than rolls
• Brightness and surface quality are critical specifications (more so than in packaging)
• Surplus lots tend to be smaller (office paper overruns)
• Price range is higher per MT than packaging grades
• Less standard sizing -- many custom cut sizes

Relevance to the Marketplace

The PRD's initial focus is European corrugated packaging surplus (Phase 1), with expansion to other grades planned for later phases. UWF paper could become relevant as the marketplace grows because:

• Morichal's network includes mills that produce printing/writing grades
• Surplus UWF has the same trading friction (manual, email-based, broker-dependent) as packaging surplus
• The same spec-based matching approach applies (GSM, width, brightness, form)
• The same container assembly economics apply to small UWF lots

Sources

• raw/articles/PRD -- Appendix A (Paper Types and GSM Ranges), section 5.3

Related

• wiki/entities/coated-paper -- coated variant of printing/writing grades
• wiki/concepts/paper-types-overview -- full paper type classification
• wiki/concepts/matching-algorithm -- paper type as matching dimension
• wiki/concepts/quality-grades -- A/B/C grading applies to all paper types
• wiki/concepts/foex-and-risi-indices -- FOEX tracks UWF production prices