How can it be black? Black is printed; The word "Daohuaxiang" is obviously written by hand, which belongs to the writing brush running script. This is written by Jiang.

(Jiang: 1930 was born in Longquan town, and 1949 founded Qinglong primary school. He loved calligraphy all his life and was quite accomplished in running calligraphy. )

I hope I am satisfied with my answer.