Alkaline

Alkaline

Definition: The base end of the pH scale, in which a material is not pH neutral, but rather, opposite of acidic on the pH scale.

Overview

In conservation and framing, understanding whether a material is acidic, neutral, or alkaline is essential for long-term preservation. Alkaline materials, when used correctly, can help neutralize acids and extend the life of paper, textiles, and other art substrates. For example, Calcium Carbonate is commonly added to paper or mat board to create a buffering reserve against acid deterioration.

Conservation and Archival Considerations

Alkaline treatments are frequently used in conservation to de-acidify paper or board products. However, some sensitive works of art-such as photographs or certain pigments-may be damaged by alkaline conditions. This is why selecting the right material, such as a buffered or unbuffered mat board, depends on the specific needs of the artwork being preserved.

Related Terms

• Buffering Agent
• Calcium Carbonate
• Kaolin Clay
• Ph