It is also employed as a component of adhesives and emulsifiers, as a water-soluble protective film, and as a starting material for the preparation of other resins. By reaction with butyraldehyde (CH3CH2CH2CHO) and formaldehyde (CH2O), PVA can be made into the resins polyvinyl butyral (PVB) and polyvinyl formal (PVF).
Tassels are available in different colors, depending on the type of degree conferred. Master's hoods will show colors to indicate the area of study. The color designations for tassels and/or hoods are listed below. Black Tassels--Bachelor of Arts, Bachelor of Fine Arts, all Master's degrees.
At the end of the Mexican flag history, certain symbols and meanings were agreed upon. The new meanings of the colours are fairly recent: Green is hope, white is unity, and red is the blood of heroes. These meanings are not enforced by law, so they may continue to change.