A method for forming a three-dimensional object comprising: 1) coating a layer of liquid radiation curable resin comprising from 30 to 80 wt.% of at least one cationically curable compound on a substrate; 2) contacting the layer of liquid radiation curable resin with a previously cured layer; 3) selectively exposing the layer of liquid radiation curable resin to actinic radiation, provided by a source of actinic radiation, thereby forming a cured layer which adheres to the previously cured layer; 4) allowing a separation delay time to occur and after the conclusion of the separation delay time separating the cured layer and the substrate, wherein the separation delay time is 30.0 seconds or less; and 5) repeating steps 1-4 a sufficient number of times in order to build up a three-dimensional object; wherein the separation delay time is the time from first exposure of the layer of liquid radiation curable resin to actinic radiation to the time that the storage shear modulus (G') of the liquid radiation curable resin is measured to have achieved a (G') value of greater than 9.0 × 10 5 Pa, as measured from the beginning of light exposure, when the storage shear modulus (G') of the liquid radiation curable resin is measured on a Real Time Dynamic Mechanical Analyzer and determined as described herein, as the liquid radiation curable resin is cured with a light intensity of 50 mW/cm 2 for 1.0 second light exposure time, wherein the liquid radiation curable resin is able to achieve a storage shear modulus of greater than 7.5 × 10 5 Pa 2.0 seconds after light exposure begins when measured on a Real Time Dynamic Mechanical Analyzer and determined as described herein. 1) coating a layer of liquid radiation curable resin comprising from 30 to 80 wt.% of at least one cationically curable compound on a substrate; 2) contacting the layer of liquid radiation curable resin with a previously cured layer; 3) selectively exposing the layer of liquid radiation curable resin to actinic radiation, provided by a source of actinic radiation, thereby forming a cured layer which adheres to the previously cured layer; 4) allowing a separation delay time to occur and after the conclusion of the separation delay time separating the cured layer and the substrate, wherein the separation delay time is 30.0 seconds or less; and 5) repeating steps 1-4 a sufficient number of times in order to build up a three-dimensional object; wherein the separation delay time is the time from first exposure of the layer of liquid radiation curable resin to actinic radiation to the time that the storage shear modulus (G') of the liquid radiation curable resin is measured to have achieved a (G') value of greater than 9.0 × 10 5 Pa, as measured from the beginning of light exposure, when the storage shear modulus (G') of the liquid radiation curable resin is measured on a Real Time Dynamic Mechanical Analyzer and determined as described herein, as the liquid radiation curable resin is cured with a light intensity of 50 mW/cm 2 for 1.0 second light exposure time, wherein the liquid radiation curable resin is able to achieve a storage shear modulus of greater than 7.5 × 10 5 Pa 2.0 seconds after light exposure begins when measured on a Real Time Dynamic Mechanical Analyzer and determined as described herein.