<prompt> Amount of volumetric polymerization shrinkage seen in composites during curing is:0.5-21.7-5.75.2-9.812.8-17.76  <response>: Linear shrinkage is about 0.2 to 2.Volumetric shrinkage is 1.7-5.7.Shrinkage is seen towards the centre in self cure materials and towards the light source in light cure materials. Reference : Nisha Garg 2ND ed Pg: 310 