Le contaminación desengrasante ku manifiesta chuunil laat'a'an way le ju'un aluminio ti' 0 noj. Ka' recocer le ju'un aluminio, Prueba yo'osal le método cepillado yéetel ja', ka ma' u chukik le nivel especificado ti' le prueba cepillado yéetel ja'.
Le ju'un aluminio ba'ax k'a'abet u prueba p'o' yéetel ja' ku meyajtiko'ob chuunil laat'a'an utia'al u imprimir, Compuesto yéetel uláak' materiales, etc. Tune', 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.
