It needs to be oxidized, and the oxidation requirements are relatively high, and an oxide film of sufficient thickness is required. Our experience: Generally, the oxidation time takes more than 1 hour.

Oxidized printing , for re-curing (sealing) treatment, it is recommended to use high-temperature sealing. Room-temperature sealing is costly and not effective.

As for the matte white surface, the aluminum plate has been sanded before oxidation. . There are alkaline sand blasting and acid sand blasting on the sand surface. In foreign countries, the acid sand blasting process began to mature in the 1990s. We generally use acid sand blasting.

I am in Changzhou, Jiangsu, if it is not far away Can discuss with each other