Workpiece description: The customer coats the aluminum alloy workpiece with primer for pre-adhesion, and currently has the need to remove the cured primer. And it can't damage the aluminum alloy. It cannot be removed with solvents such as acetone, ethanol, ether, and toluene.

The picture below shows the use of hardened ink remover ACHM04-H1. Heat the medicine to 100°C, soak for about 1 hour, and take it out. It was found that the primer on the surface had been completely decomposed.

flush. It was found that the primer on the surface had been completely removed, and the aluminum sheet was not damaged or corroded at all.

After placing in the shade.

Sample before washing
The darker brown color is caused by covering the residual glue of TRM tape.

magnify with a microscope
It can be clearly seen that the top of the plate is covered with a thin layer of residual glue.

Use Xiwei TM Hardening Ink Cleaner ACHM01, heat to 120~140°C, soak for 5 minutes, take it out, and wash it under the tap.

After cleaning, it was found that the residual glue on the plate had been completely removed.

Of course, the black glue packaged on the back cannot be damaged, discolored or whitened to be considered qualified.

Repeat the test. Before washing.

After cleaning.

Observe with a microscope. Confirm that all residual glue has been completely removed, the fine lines on the plate are fully exposed, and there is no coating on it.

The vinyl packaged on the back is not damaged, discolored and whitened.