Archival Methods 20x24" Acid-Free Card Stock, 148gsm, 50/Pack, White

While maintaining the highest standards of archival quality, this 20x24" Acid-Free Card Stock, produced by Archival Methods, offers a professional and reliable solution for all your mounting and backing needs. With its pristine white color, it provides a neutral backdrop, enhancing the visual appeal of your photographs or artwork.

This card stock is not only acid- and lignin-free but also has a pH level of 9 (+/-0.5), ensuring its longevity and resistance to deterioration. Its thickness, denoted by a 100 Lb basis weight or 0.008 of an inch (20x26), is derived from alpha-cellulose pulp sourced from purified wood fiber, contributing to its sturdy and durable nature.

The card stock undergoes an alkaline sizing process, both internally and externally, without the use of alum in the manufacturing process. This enhances its resistance to moisture and ensures a smooth surface for writing or printing. Buffered with 2-3% calcium carbonate, it maintains an alkaline reserve, further safeguarding your precious memories from acidic damage.

Free from dyes and non-bleeding, this card stock ensures that your photographs or artwork remain untarnished. It has passed the rigorous Photographic Activity Test (PAT) ISO IT 18916 (formerly ISO 14523 ANSI IT9.16), a testament to its archival quality. Moreover, its lignin content, tested by TAPPI 236 cm-85, has a Kappa number of less than five, indicating minimal lignin presence and thus, reduced yellowing over time.

This versatile card stock is perfect for stiffening and support inserts for sleeves, sheet protectors, and pocketed pages. It serves as an excellent choice for album pages for mounting photographs or documents, and as acid-free backing in picture frames. Its writable surface allows you to add titles, identification information, and more, making it an indispensable tool for artists, photographers, and archivists alike.