A method of making an abrasive article, comprising: a) a subprocess, comprising: i) depositing a layer of loose powder particles in a confined region, wherein the loose powder particles comprise polymer bond precursor particles and abrasive particles, and wherein the layer of loose powder particles has substantially uniform thickness; ii) jetting a liquid binder precursor material in predetermined regions of the layer of loose powder particles; and iii) converting the liquid binder precursor material into a temporary binder material, wherein the temporary binder material bonds to at least a portion of the polymer bond precursor particles and the abrasive particles in the predetermined regions to form a layer of bonded powder particles; b) independently carrying out step a) a plurality of times to generate a unitary abrasive article preform comprising the bonded powder particles and remaining loose powder particles, wherein in each step a), either or both the loose powder particles and the liquid binder precursor material are the same or different from those of the adjacent layers and wherein step a) is independently repeated with change of the predetermined regions to generate layer by layer the abrasive article preform; c) after the unitary abrasive article preform is formed in steps (a) and (b), separating substantially all of the remaining loose powder particles from the unitary abrasive article preform, wherein separating the remaining loose powder particles results in: at least one tortuous cooling channel extending at least partially through the unitary abrasive article preform; or at least one arcuate cooling channel extending at least partially through the unitary abrasive article preform; and wherein the at least one tortuous cooling channel or arcuate cooling channel is formed by the portions receiving no temporary liquid organic binder in step (ii); and d) converting the polymer bond precursor particles in the abrasive article preform into polymer bond particles, wherein the polymer bond particles retain the abrasive particles to form a polymer bond abrasive article, optionally wherein the abrasive particles comprise at least one of diamond particles, cubic boron nitride particles, or metal oxide ceramic particles. a) a subprocess, comprising: i) depositing a layer of loose powder particles in a confined region, wherein the loose powder particles comprise polymer bond precursor particles and abrasive particles, and wherein the layer of loose powder particles has substantially uniform thickness; ii) jetting a liquid binder precursor material in predetermined regions of the layer of loose powder particles; and iii) converting the liquid binder precursor material into a temporary binder material, wherein the temporary binder material bonds to at least a portion of the polymer bond precursor particles and the abrasive particles in the predetermined regions to form a layer of bonded powder particles; i) depositing a layer of loose powder particles in a confined region, wherein the loose powder particles comprise polymer bond precursor particles and abrasive particles, and wherein the layer of loose powder particles has substantially uniform thickness; ii) jetting a liquid binder precursor material in predetermined regions of the layer of loose powder particles; and iii) converting the liquid binder precursor material into a temporary binder material, wherein the temporary binder material bonds to at least a portion of the polymer bond precursor particles and the abrasive particles in the predetermined regions to form a layer of bonded powder particles; b) independently carrying out step a) a plurality of times to generate a unitary abrasive article preform comprising the bonded powder particles and remaining loose powder particles, wherein in each step a), either or both the loose powder particles and the liquid binder precursor material are the same or different from those of the adjacent layers and wherein step a) is independently repeated with change of the predetermined regions to generate layer by layer the abrasive article preform; c) after the unitary abrasive article preform is formed in steps (a) and (b), separating substantially all of the remaining loose powder particles from the unitary abrasive article preform, wherein separating the remaining loose powder particles results in: at least one tortuous cooling channel extending at least partially through the unitary abrasive article preform; or at least one arcuate cooling channel extending at least partially through the unitary abrasive article preform; and wherein the at least one tortuous cooling channel or arcuate cooling channel is formed by the portions receiving no temporary liquid organic binder in step (ii); and at least one tortuous cooling channel extending at least partially through the unitary abrasive article preform; or at least one arcuate cooling channel extending at least partially through the unitary abrasive article preform; and wherein the at least one tortuous cooling channel or arcuate cooling channel is formed by the portions receiving no temporary liquid organic binder in step (ii); and d) converting the polymer bond precursor particles in the abrasive article preform into polymer bond particles, wherein the polymer bond particles retain the abrasive particles to form a polymer bond abrasive article, optionally wherein the abrasive particles comprise at least one of diamond particles, cubic boron nitride particles, or metal oxide ceramic particles.