Acquisition　of　the　as-received　industrial　material　absorptance　of　light　is　important　for　guiding　the　laser　machining　processing.　However,　most　of　the　published　absorptance　data　presently　used　take　only　polished　pure　metals　into　account　rather　than　the　engineering　grade　alloys　which　are　actually　being　processed　with　diverse　surface　appearances　in　manufacturing.　Moreover,　the　previous　studies　usually　aimed　at　measuring　a　single　wavelength　laser　absorptance,　though　there　are　various　kinds　of　lasers　in　practical　application.　In　our　study,　we　achieve　the　full　spectrum(200-1050nm)　absorptance　of　various　types　of　engineering　grade　metals.　The　samples　used　include　machining　stainless　steels　and　titanium　alloys　by　turning　and　grinding,　and　vertical　milling　and　plane　abrasion　steel　reference　blocks,　whose　surfaces　present　distinct　microstructures　and　have　different　roughness.　The　measurements　were　made　using　an　integrating　sphere　plus　spectrometer　with　halogen　and　deuterium　light　source　so　that　they　could　provide　a　wide　incident　spectrum(200-1050nm).　Surface　3D　microstructure　figure　and　associated　2D　roughness　curve　were　obtained　using　a　LSCM(laser　scanning　confocal　microscope).　Some　clear　trends　were　found　in　our　measurement　results.　For　all　ferrous　alloy　samples,　respectively,　the　absorptance　increased　when　the　wavelength　value　decreased.　As　to　the　titanium　alloy,　it　appeared　a　more　complicated　trend　through　the　results,　that　was,　the　absorptance　firstly　decreased　and　then　began　to　go　up　along　with　the　decreasing　wavelength.　Meanwhile,　for　reference　block　samples,　an　explicit　trend　correlating　absorptance　with　roughness　was　discovered　that　the　absorptance　of　samples　which　were　under　the　same　processing　method　increased　for　roughness　rising.　However,　for　turning　titanium　alloys　and　stainless　steels,　the　trend　proved　to　be　opposite.　It　presented　a　significant　decrease　of　absorptance　for　an　increasing　roughness.　Further　study　indicates　that　this　result　was　due　to　the　influence　of　different　surface　periodic　microstructure.　In　addition,　at　the　similar　roughness　value,　the　absorptance　of　a　same　material　using　grinding　or　plane　abrasion　was　considerably　higher　than　that　of　using　turning　or　milling.　This　may　help　improve　the　materials＇　practical　machining　parameters　for　laser　processing.