Paper Pulp

Paper Pulp

Definition: Paper Pulp is the raw fibrous material used in the production of paper, matboard, and other paper-based products. It is typically derived from wood, cotton, or recycled fibers. High-quality archival paper pulp is purified to remove acids and lignin, ensuring long-term preservation of artwork and documents.

Composition and Types

• Wood Pulp: Fibers extracted from trees, commonly used in standard paper and mats. May contain lignin and acids unless treated.
• Cotton or Rag Pulp: Derived from cotton linters or textile rags. Naturally acid-free and highly durable, suitable for archival purposes.
• Recycled Pulp: Made from post-consumer paper products. Often blended and treated to reduce acids and impurities.

Applications

• Manufacturing of paper for writing, printing, and art purposes.
• Production of matboard for picture framing.
• Archival-quality materials for conservation framing and document preservation.

Processing and Treatment

• Pulp is often bleached and refined to achieve the desired texture, color, and smoothness.
• Archival-grade pulp undergoes lignin removal and neutralization to prevent acid migration and yellowing over time.
• Additional additives may be included for brightness, strength, or water resistance.

Considerations

• Acidic pulp can deteriorate artwork over time.
• Archival projects require lignin-free, pH-neutral or buffered pulp.
• Choice of pulp impacts the quality, durability, and lifespan of the final paper or matboard.

Related Terms

• Paper
• Core
• Vellum
• Components