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<p>[QUOTE=&quot;desertgem, post: 2242498, member: 15199&quot;]What you say about dust is true, silicates @ Mohs hardness of 7, whereas gold and silver are approx 2.5-3. But the hardness of cellulose ( depending on the plant fiber) is in the 5 range. Even the cotton gloves for clean rooms ( no dust) can scratch the surface of a gold or silver coin if applied to the surface. Certainly, treatment of the cellulose with chemicals to soften the structure of the cellulose can make it more flexible and softer to the touch, but the hardness of the material is still there, just more difficult to measure with micro-instruments.[/QUOTE]</p><p><br /></p>

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