Pretritmen i gat ol wok we ol i mekim long han na ol wok bilong pritritmen we ol i mekim long han, na ol i brukim moa long otomatik sprei na otomatik dip sprei. Pastaim long putim paura, ol wokpis i mas kisim tritmen long rausim oil na ros. Dispela step i yusim kain kain kemikel, moa yet ol samting bilong rausim ros, ol samting bilong rausim gris, ol samting bilong mekim 'surface conditioner', na ol samting bilong 'phosphating'.
Insait long 'pretreatment' seksen o woksop bilong 'coating production line', namba wan samting em long kamapim ol sistem we i mas i stap bilong baim, karim, putim, na yusim ol strongpela asid na alkali; givim ol wokman ol klos bilong lukautim ol yet; mekim gutpela na gutpela kontena, hanling, na ikwipmen; na kamapim ol rot bilong helpim ol manmeri long taim bilong birua na ol rot bilong kisim bek ol manmeri sapos i gat birua. Namba tu, bikos 'pretreatment' seksen bilong 'coating production line' i save kamapim sampela pipia ges na pipia wara, ol samting bilong lukautim envairomen i mas i gat ol masin bilong rausim win, drein, na ol masin bilong klinim pipia.
Kwaliti bilong ol wokpis we ol i bin tritim pastaim bai i senis bikos long ol narapela narapela rot bilong tritim pastaim na ol proses bilong wokim lain bilong koting. Long ol wokpis we ol i bin tritim gut na rausim olgeta oil na ros long en, ol i save mekim 'phosphating' o 'passivation' tritmen planti taim bihain long 'pretreatment' bilong stopim ros gen insait long sotpela taim. Pastaim long putim paura long en, ol i mas draim ol wokpis we i gat 'phosphated' long rausim wara antap long en. Long liklik-batch, singel-pis prodaksen, ol i save yusim 'natural air drying', 'sun drying', o 'wind drying'. Long bikpela-batch, asembli lain prodaksen, ol i save yusim '-draim long liklik tempereja long yusim ol aven o draim tanel.
