- Shape and dimensions
- Colorimetric prescriptions
- Resistance to external factors:
- water resistance
- corrosion resistance
- resistance to the effects of fuel
- resistance color
- impact strength
- resistance to cleaning
- resistance rigidity of signs
- stability of optical properties
- Color fastness
- Corrosion resistance
- Resistance to the effects of fuel
- Water resistance
- Impact strength
- Resistance to cleaning, manual cleaning
- Heat resistance
- Rigidity of signs
- Stability of optical properties
