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Unbuffered storage materials are acid-free and lignin-free and contain no additional alkaline reserve to raise the pH of the storage paper or the items in contact with it. Unbuffered envelopes are best used for colour photographic prints and colour photographic negatives. They are also useful for storage of small objects (e.g., medals and ribbons).

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Unbuffered storage materials are acid-free and lignin-free and contain no additional alkaline reserve to raise the pH of the storage paper or the items in contact with it. Unbuffered envelopes are best used for colour photographic prints and colour (more)