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..
Launched Negro History Week in 1926, chosen in the second week of February between the birthdays of Frederick Douglass and Abraham Lincoln, which evolved into Black History Month in 1976. Known for writing the contributions of black Americans into the national spotlight, received a Ph.D at Harvard University.