Lignin-Free Tan Document Cases :
We offer a choice of either our standard Document case (blue-gray outside, white inside) or our lining-free solid tan board which is made completely of lining-free bleached cellulose fibers for both purity and strength. Both boards are acid-free with a pH of approximately 8.5 and are buffered with approximately 3% calcium carbonate to retard the effects of migrant acidity. The combination of our strong, durable 60-point thickness board and metal edged construction make these boxes your best choice for lasting protection. Pull strings are included on the 12.7 cm (5") deep boxes in both letter and legal size. Box sizes are inside dimensions.