▁and ▁enthus iast s . ▁However , ▁little ▁was ▁used ▁for ▁practical ▁household ▁applications , ▁for ▁example , ▁orn amental ▁objects . ▁Some ▁practical ▁examples ▁include ▁a ▁working ▁clock ▁and ▁g ears ▁printed ▁for ▁home ▁wood working ▁machines ▁among ▁other ▁purposes . ▁Web ▁sites ▁associated ▁with ▁home ▁ 3 D ▁printing ▁t ended ▁to ▁include ▁back scr atch ers , ▁coat ▁hook s , ▁door ▁kn obs , ▁etc . ▁ ▁The ▁open ▁source ▁Fab @ Home ▁project ▁has ▁developed ▁printer s ▁for ▁general ▁use . ▁They ▁have ▁been ▁used ▁in ▁research ▁environments ▁to ▁produce ▁chemical ▁comp ounds ▁with ▁ 3 D ▁printing ▁technology , ▁including ▁new ▁ones , ▁initially ▁without ▁immediate ▁application ▁as ▁proof ▁of ▁principle . ▁The ▁printer ▁can ▁print ▁with ▁anything ▁that ▁can ▁be ▁disp ensed ▁from ▁a ▁s yr inge ▁as ▁liquid ▁or ▁paste . ▁The ▁developers ▁of ▁the ▁chemical ▁application ▁en vis age ▁both ▁industrial ▁and ▁domestic ▁use ▁for ▁this ▁technology , ▁including ▁en abling ▁users ▁in ▁remote ▁locations ▁to ▁be ▁able ▁to ▁produce ▁their ▁own ▁medicine ▁or ▁household ▁chemical s . ▁▁ 3 D ▁printing ▁is ▁now ▁working ▁its ▁way ▁into ▁households , ▁and ▁more ▁and ▁more ▁children ▁are ▁being ▁introduced ▁to ▁the ▁concept ▁of ▁ 3 D ▁printing ▁at ▁earlier ▁ages . ▁The ▁prospect s ▁of ▁ 3 D ▁printing ▁are ▁growing , ▁and ▁as ▁more ▁people ▁have ▁access ▁to ▁this ▁new ▁innov ation , ▁new ▁uses ▁in ▁households ▁will ▁emer ge . ▁ ▁The ▁Open Ref lex ▁SL R ▁film ▁camera ▁was ▁developed ▁for ▁