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What does it mean that Creative Memories papers are acid-free?

April 26, 2017acid-free creative mean memories papers

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What does it mean that Creative Memories papers are acid-free?

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Creative Memories papers have a pH of 7.0 to 9.5. When paper has a pH outside of this range, it can discolor and become brittle over time. The pH test is conducted using the cold extraction method. Cold extraction measures the actual pH of the paper after it has soaked in distilled water.