Filimka fidinta waxaa laga heli karaa dhumuc iyo ballac kala duwan si loo daboolo baahiyaha duubista kala duwan iyo noocyada alaabta.
Dhumucda waxaa badanaa lagu muujiyaa microns ama cabbir, iyadoo dhumucda filimka fidinta caadiga ah ay tahay 12-30 microns (μm) ama 50 cabbir - 120 cabbir.
Ballaca badanaa wuxuu u dhexeeyaa 12 ilaa 20 inji (30 ilaa 50 cm) waxaana loo habeyn karaa iyadoo loo eegayo shuruudaha gaarka ah.
Dhumucda:
Dhumucyo kala duwan ayaa bixiya heerar kala duwan oo xoog iyo ilaalin ah.
Filimada dhumucda weyn, sida 20-35 μm (80-140 cabbir), waxay ku habboon yihiin walxaha culus ama kuwa fiiqan, iyagoo siinaya iska caabin daloolin oo la xoojiyay, filimkaas oo u oggolaanaya inuu maareeyo culeysyo culus.
Filimada khafiifka ah, sida 10-15 microns (40-90 cabbir), waxay ku habboon yihiin walxaha fudud ama marka la mudnaanta siiyo hufnaanta kharashka.
Ballaca:
Filimka fidinta wuxuu ku yimaadaa ballacyo kala duwan, badanaa 12 inji (30 cm) ilaa 20 inji (50 cm).
Doorashada ballaca waxay ku xiran tahay cabbirka iyo cabbirka alaabta la duubayo.
Dooro ballaca ballaaran marka aad baakadeynayso alaabta waaweyn ama kuwa waaweyn si aad u hesho dabool wanaagsan iyo xasillooni.
Sida Loo Xisaabiyo Tilmaamaha Filimka Fidinta Loo Baahan Yahay
| Xisaabinta Miisaanka | Xisaabinta Dhererka |
| Miisaanka = Dhererka (m) * dhumucda (um) * ballaca (cm) * 0.918 | Dhererka = Miisaanka(kg) / dhumucda (mm) / ballaca (cm) / 0.918 |
| Tusaale Bixi: | |
| Dhererka 550m, dhumucdiisuna waa 22um, ballaciisuna waa 50cm, miisaankiisuna waa qiyaastii 5.5 kgs. (550*0.022*0.5*0.918=5.5) | |
| Miisaan 3 kgs ah, dhumucdiisuna tahay 22um, ballac 50CM ah, dhererkuna waa qiyaastii 297m. (3/0.022/0.5/0.918=297) | |












