Solid imaging method using compositions containing core-shell polymers

A method for accurately fabricating an integral three-dimensional object from successive layers of a photohardenable liquid composition comprising the steps of:

• (a) forming a layer of a photohardenable liquid;
• (b) photohardening at least a portion of the layer of photohardenable liquid by exposure to actinic radiation;
• (c) introducing a new layer of photohardenable liquid onto the layer previously exposed to actinic radiation;
• and
• (d) photohardening at least a portion of the new liquid layer by exposure to actinic radiation, with the requirement that the photohardenable composition contains deflecting matter which comprises an ethylenically unsaturated monomer, a photoinitiator, and radiation deflecting matter comprising a polymer having a core formed from monomers comprising
• (i) a monofunctional ethylenically unsaturated monomer, constituting 5%-97% of the total core by weight;
• (ii) a multifunctional ethylenically unsaturated monomer or oligomer constituting 2%-70% of the total core by weight;
• and
• (iii) an ethylenically unsaturated monomer with a grafting site constituting 1%-25% of the total core by weight,
• wherein the deflecting matter has a first index of refraction, and the rest of the composition having a second index of refraction, the absolute value of the difference between the first index of refraction and the second index of refraction difference by at least 0.01.