Chemical resistance of Dura
5: no effect – No noticeable change in the material surface.
4: Excellent – Slight detectable change in color or gloss, but no change in surface function or life.
3: Good – Significant discernible change in color or gloss, but no significant change in surface function or life.
2: Sufficient – Significant visual changes due to discoloration or etching possibly leading to deterioration of function over an extended period of time.
1: Unsatisfactory – Pitting, cratering or erosion of the surface. Obvious and significant deterioration.
DU: Dura derivatives
DUA: Dura as additive in lacquers
AM: Alkyd melamine system
PU: 2K Polyurethane System