# Discoloration of a denture constructed from cold cure acrylic resin is due to:
A. Absorption of oral fluids
B. PH changes in saliva
C. Leaching out of tertiary amines
D. Leaching out of excess monomer
The correct answer is C. Leaching out of tertiary amines.
The color stability of chemically activated resins is generally inferior to the color stability of heat activated resins. This property is related to the presence of tertiary amines with in the cold cure resins, which are highly susceptible to oxidation.
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