Glltn cttng s th prcss f prdcng smll rctnglr tms f fxd dmnsns frm gvn lrg rctnglr sht, sng nly glltn-cts. glltn-ct (ls clld n dg-t-dg ct) s strght bsctng ln gng frm n dg f n xstng rctngl t th ppst dg, smlrly t ppr glltn.
Glltn cttng s prtclrly cmmn n th glss ndstry. Glss shts r scrd lng hrzntl nd vrtcl lns, nd thn brkn lng ths lns t btn smllr pnls. t s ls sfl fr cttng stl plts, cttng f wd shts t mk frntr, nd cttng f crdbrd nt bxs.
Thr r vrs ptmztn prblms rltd t glltn cttng, sch s: mxmz th ttl r f th prdcd pcs, r thr ttl vl; mnmz th mnt f wst (nsd prts) f th lrg sht, r th ttl nmbr f shts. Thy hv bn stdd n cmbntrl gmtry, prtns rsrch nd ndstrl ngnrng.
rltd bt dffrnt prblm s glltn prttn. n tht prblm, th dmnsns f th smll rctngls r nt fxd n dvnc. Th chllng cms frm th fct tht th rgnl sht mght nt b rctnglr - t cn b ny rctlnr plygn. n prtclr, t mght cntn hls (rprsntng dfcts n th rw mtrl). Th ptmztn gl s slly t mnmz th nmbr f smll rctngls, r mnmz th ttl lngth f th cts.