PU synthetic leather (also known as bi-cast leather, bycast leather or artificial leather, sometimes described as split leather) is a material made with asplit leather backing covered with a layer of polyurethane (hence the term PU leather) that is applied to the surface and then embossed.
Constitution Daily. How a C-grade college term paper led to a constitutional amendment. The 27th Amendment is the most recent amendment to the Constitution, and its existence today can be traced to a college student who proposed the idea in a term paper and was given a C by his professor for the idea.
Citation: The House Joint Resolution proposing the 15th amendment to the Constitution, December 7, 1868; Enrolled Acts and Resolutions of Congress, 1789-1999; General Records of the United States Government; Record Group 11; National Archives.How to use citation info.(on Archives.gov).et free by the 13th amendment, with citizenship guaranteed by the 14th amendment, black males were given the vote by the 15th amendment. From that point on, the freedmen were generally expected to fend for themselves.