The　printing　accuracy　in　ceramic　stereolithography　is　deteriorated　by　shrinkage　due　to　photopolymerization　of　monomers　and　broadening　owing　to　scattering　of　light.　To　improve　the　accuracy　of　printed　alumina　parts,　a　series　of　experiments　involving　the　reduce　of　shrinkage　and　broadening　were　conducted.　Firstly,　the　dependence　of　conversion　of　monomers,　shrinkage　of　suspensions　and　warpage　of　parts　on　energy　doses　was　quantitively　investigated　and　correlated,　with　which　the　shrinkage　was　well　controlled　through　optimization.　Besides,　the　warpage　problem　was　effectively　resolved　when　adding　30　wt%　PEG-200　in　the　suspensions　to　release　the　accumulated　internal　stress.　Next,　the　broadening　under　different　energy　doses　was　observed　and　reduced　by　addition　of　absorbers,　after　which　a　self-defined　parameter　Cd/We　was　applied　to　suggest　strategies　in　the　selection　of　appropriate　processing　parameters　and　absorber　content.　On　this　basis,　the　holes　with　a　diameter　ranging　from　50–200　μm　were　successfully　printed.　©　2024