Hottenroth number

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A measure of the degree of ripening of viscose.

Note:A Hottenroth number is expressed as the number of millilitres of 10% ammonium chloride solution that it is necessary to add to a somewhat diluted viscose (solution) to induce incipient coagulation under standard conditions.
also termed salt figure

Textile Resource (http://www.textile.org.uk)

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