Hot black oxide can be done from generic mixtures of caustic soda, sodium nitrite / nitrate, wetting agents and stabilizers or from proprietary mixes. The result of the process is an attractive but very thin and marginally corrosion-resistant, dark black iron oxide finish.
Negro History Week (1926). The precursor to Black History Month was created in 1926 in the United States, when historian Carter G. Woodson and the Association for the Study of Negro Life and History announced the second week of February to be Negro History Week..
Since its inception in 1926, Negro History Week and Black History Month have been given annual themes. The first annual theme was simply, The Negro in History, but since then the themes have grown more specific. Here is a list of the most current and future themes for Black History Month.