Both kinds must be watermarked, and the permanent paper must bear some identification in the watermark of the manufacturer, the number of the paper, and the year of manufacture. The furnish can be either rag or chemical pulp, but not recycled fiber. Durability is measured by fold and tear. All these specifications seem reasonable enough, and not far different from permanence standards developed in this country. What really sets this standard off from all the rest is the accelerated aging test.
Standards also exist for microfilms and magnetic tapes for Finnish archives.
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