Why has my White Paint, Gone Yellow ??
Why Does Paint Yellow ?? This has been an issue with mainly solvent based coatings. In 2010 new regulations came in to force relating to solvent emissions sometimes referred to as VOC’s ( Volatile organic Compounds ) this was introduced for all solvent based decorative coatings used mainly on wood and metal. The reduction in solvent in the paint was to comply with European regulations.
At the time there were many complaints that many of these reduced solvent based paints were more likely and in lots of cases did discolour in lots of cases going a pale cream colour. The issue was more prominent where the paint was applied to areas with low levels of natural daylight, backs of doors or skirtings behind furniture or oddly where fumes form other materials were present, such as carpet adhesives, levelling compounds.. Who knew paint was so technical .. The manufacturers during testing could not have foreseen some of these more unusual circumstance.
Many of the issues have been addressed by reformulating the paints but solvent paints do remain more prone to this issue than water based coatings. If you want a brighter white and for it to last longer water based paints are a better option.
There is often a misconception that Water Borne paint does not last as long as Solvent Borne. Firstly paint is neither Water or Solvent based, the pigments, binders and resins are merely suspended in either water or solvent. These are merely carriers to get the the paint components from a tin to the substrate, once dried … the solvent or water have evaporated and left the pigment, binder and resin behind you are left with the paint film. They are no more durable than one another, however there are many types of coating for the many thousands of applications the wrong paint on the wrong job and yes it will fail. Right paint for the intended job, we would not recommend emulsion paint on the nose cone of an aeroplane.
Components of Paint
- Pigment
- Binder
- Resin
- Carrier ( Solvent – Water )
- Additives
