A method of forming a three-dimensional article by additive manufacturing, the method comprising: 1) providing an ink comprising: up to 80 wt. % oligomeric curable material; up to 80 wt. % monomeric curable material; up to 10 wt. % photoinitiator; up to 1 wt. % non-curable absorber material; and up to 10 wt. % one or more additional components, based on the total weight of the ink, wherein the total amount of the oligomeric curable material, monomeric curable material, photoinitiator, non-curable absorber material, and one or more additional components is equal to 100 wt. %; wherein the photoinitiator is operable to initiate curing of the oligomeric curable material and/or the monomeric curable material when the photoinitiator is exposed to incident curing radiation having a Gaussian distribution of wavelengths and a peak wavelength λ, wherein the wavelength λ is between 250 nm and 400 nm; wherein the ink has a penetration depth (D p) and a critical energy (E c) at the wavelength λ; and wherein the ink has a D p /E c value of 10-50 (μm cm 2)/mJ; and 2) selectively curing a portion of the ink using said incident curing radiation having a Gaussian distribution of wavelengths and a peak wavelength at the wavelength λ. 1) providing an ink comprising: up to 80 wt. % oligomeric curable material; up to 80 wt. % monomeric curable material; up to 10 wt. % photoinitiator; up to 1 wt. % non-curable absorber material; and up to 10 wt. % one or more additional components, based on the total weight of the ink, wherein the total amount of the oligomeric curable material, monomeric curable material, photoinitiator, non-curable absorber material, and one or more additional components is equal to 100 wt. %; wherein the photoinitiator is operable to initiate curing of the oligomeric curable material and/or the monomeric curable material when the photoinitiator is exposed to incident curing radiation having a Gaussian distribution of wavelengths and a peak wavelength λ, wherein the wavelength λ is between 250 nm and 400 nm; wherein the ink has a penetration depth (D p) and a critical energy (E c) at the wavelength λ; and wherein the ink has a D p /E c value of 10-50 (μm cm 2)/mJ; and up to 80 wt. % oligomeric curable material; up to 80 wt. % monomeric curable material; up to 10 wt. % photoinitiator; up to 1 wt. % non-curable absorber material; and up to 10 wt. % one or more additional components, based on the total weight of the ink, wherein the total amount of the oligomeric curable material, monomeric curable material, photoinitiator, non-curable absorber material, and one or more additional components is equal to 100 wt. %; wherein the photoinitiator is operable to initiate curing of the oligomeric curable material and/or the monomeric curable material when the photoinitiator is exposed to incident curing radiation having a Gaussian distribution of wavelengths and a peak wavelength λ, wherein the wavelength λ is between 250 nm and 400 nm; wherein the ink has a penetration depth (D p) and a critical energy (E c) at the wavelength λ; and wherein the ink has a D p /E c value of 10-50 (μm cm 2)/mJ; and 2) selectively curing a portion of the ink using said incident curing radiation having a Gaussian distribution of wavelengths and a peak wavelength at the wavelength λ.