Related Legal Terms & Definitions. 1  COMPETENT WITNESS One who is legally qualified to be heard to testify in a cause. 2  RESPECTABLE WITNESS One who is competent to testify in a court of justice. 3  CREDIBLE WITNESS A credible witness is one who is competent to give evidence, and is worthy ofâ¦.
In general, combustibility of polymers depends on their chemical structures. Polymers with more carbon atoms in their macromolecular structure (e.g., PE, PP, PS, PMMA) are more combustible than polymers containing halogen atoms (e.g., PVC, PVDC, PTFE).
PVD (Physical Vapor Deposition) uses a state-of-the-art process that molecularly bonds the finish to the faucet, creating a super-hard surface that is by far the most durable available today. Products with a PVD finish will not corrode, discolor, or tarnish. Even high wear and tear items like handles or pop-up drains.