- Box core is Kappa binder's board (0.1), a bookmaking board with no glue between layers
- Lined with 80 lb. acid- and lignin-free paper.
- PAT tested and passed.
- Covered in library quality F-Grade Buckram (poly-cotton) with a moisture-resistant, 100% aqueous acrylic coating.
- Adhesive is pH balanced and buffered, less than .0008% sulfur content
Archival Methods Onyx Portfolio Boxes are often the best choice where presentation is as important a factor as storage and protection. This is particularly applicable for photographs, prints and similar art work that are in what we might call live storage, regularly presented or viewed but safely housed in between.