Buffered verses Non-buffered
Buffered paper and board have calcium carbonate added to raise the pH level to 8.0-8.5. The buffering agent neutralizes acids that could potentially harm your work. They work best for the storage and display of Black & White photos and artwork on paper. Non-buffered paper and board have a pH level between 7.0-7.5. There is no buffering agent, since it may adversely affect some materials, causing color shifts or changes. Non-buffered materials are intended for use with albumen, cyanotype, dye transfer, and color prints (chromogenic), as well as protein textiles.
