A condition or degree of cure that is less than optimum, i.e. when insufficient time and/or temperature has been allowed for adequate cure; may be evidenced by tackiness, longness, or inferior physical properties.
The condition of a molded article which results when not enough time or temperature has been applied to bring about final cure and achieve maximum physical properties.
failure of the vulcanization reaction to go to completion or very close to completion, so that the crosslink concentration in the elastomer is not sufficient for full development of final properties