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..
Black History Month. The achievements and contributions of African-Americans to U.S. history have been celebrated in this country since 1926. February became the month for recognition because it marks the birthdays of two men who positively influenced African Americans in the U.S.: Frederick Douglass and Abraham Lincoln. This year also marks the 50th anniversary of the Freedom Rides, which occurred in May 1961.