Ar contaminación ar desengrasante ar manifiesta principalmente jar superficie ar he̲'mi aluminio jar 0 dätä. 'Mefa xta recocer ar he̲'mi aluminio, Prueba ir nge ar nt'ot'e cepillado ko ar dehe, ne hingi alcanza ar za̲ ár nthe̲ especificado ntsa̲ cepillado ko ar dehe.
Ar he̲'mi aluminio da requiere ar ntsa̲ lavado ko ar dehe ar gi japu̲'be̲fi principalmente pa imprimir, Xi t'o̲t'e ko ya materiales, etc. Ir, the surface of the aluminum foil must be degreasing clean and reach the level specified by the water-washing test.
The main reasons for unclean degreasing: excessive oil on the surface of the aluminum box; excessive slitting tension; unreasonable annealing process.
