Stereolithography (SLA) yog qhov siv dav tshaj plaws ntawm kev siv tshuab thev naus laus zis. Nws tuaj yeem tsim cov khoom muaj tseeb thiab cov ncauj lus kom ntxaws polymer. Nws yog thawj txheej txheem prototyping sai, tau tshaj tawm xyoo 1988 los ntawm 3D Systems, Inc., raws li kev ua haujlwm los ntawm tus neeg tsim khoom Charles Hull. Nws siv lub zog qis, tsom ntsoov UV laser kom taug qab cov ntu ntu ntawm cov khoom peb sab hauv lub vat ntawm cov kua photosensitive polymer. Raws li lub laser taug qab cov txheej txheem, cov polymer solidifies thiab cov cheeb tsam ntau dhau los ua kua. Thaum cov txheej txheem tiav lawm, ib txheej txheej txheej yog txav mus thoob plaws saum npoo kom du ua ntej tso rau txheej tom ntej. Lub platform yog txo qis los ntawm qhov kev ncua deb sib npaug ntawm cov txheej tuab (feem ntau 0.003-0.002 hauv), thiab txheej tom ntej yog tsim rau saum cov txheej txheem ua tiav yav dhau los. Cov txheej txheem ntawm tracing thiab smoothing no rov ua dua kom txog thaum tsim tiav. Thaum ua tiav, ib feem yog elevated saum lub vat thiab drained. Cov polymer ntau dhau yog swabbed los yog yaug tawm ntawm qhov chaw. Feem ntau, kev kho zaum kawg yog muab los ntawm qhov muab tso rau hauv qhov cub UV. Tom qab kev kho zaum kawg, cov kev txhawb nqa raug txiav tawm thiab cov npoo yog polished, sanded los yog lwm yam tiav.