<prompt> For accurate replica reproducing intra and extraoral tissues, impression materials are able to transform into a rubbery or rigid solid in the mouth within2 min7 min10 min15 min  <response>: To produce accurate replicas of intra and extra oral tissues, the impression materials should be:Sufficiently fluid to adapt to the oral tissues. Viscous enough to be contained in a tray. Able to transform set into a rubbery or rigid solid in the mouth in a reasonable time less than 7 min. Resistant to distortion or tearing when removed from the mouth. Dimensionally stable long enough to allow one or more casts to be poured. Biocompatible.Cost-effective in terms of time as well as the expense of the associated processing equipment.Phillips 12 ed page no 152 