Before washing.

micrograph:

Use Xiwei TM aluminum alloy water-based paint stripper (hot steel mold cleaner) AHLR03-GM to scrub at room temperature to remove coke and tar on the mold. After cleaning with water, clean the silicon dioxide deposits and metal oxides on the mold with Xiwei TM silicon dioxide film cleaner SMC04.

After rinsing with water, blow dry with an air gun. From the photo below, it can be seen that the mold has been cleaned and restored to white.

micrograph:

Comparison (the left picture below is before cleaning, and the right picture is after cleaning).