Isilingi esijikelezayo sisilingi sokuphakamisa iinjongo zonke, eziphakamileyo zomelele kwaye zingonakali kumthwalo waso.Ikhaphukhaphu kakhulu ngobunzima kwaye ibhetyebhetye ngokungenasiphelo kuwo onke amacala, kulula kwaye iyakhawuleza ukuyilawula naxa imithwalo emile kakuhle okanye eethe-ethe iphakanyiswa.Yenziwe kwi-EN 1492-2.