ARCHIVAL ASSURANCE - Ensures your cherished photos and documents are preserved with a pH testing pen, verifying acid-free paper and paperboard materials for long-lasting protection. ACID-FREE CONFIRMATION - Quickly and easily tests the pH level of paper, guaranteeing it meets archival standards, preventing deterioration and discoloration over time. DURABLE PROTECTION - Offers a reliable method to assess the safety of storage materials, ensuring your valuable items are shielded from harmful acids that cause damage. PROPER SIZING - Designed for precise application, the pen allows accurate testing without damaging the material, ensuring only a small area is tested for pH levels.