Why does paint yellow and how can you prevent it?

Paint yellowing is often noticeable when you apply a new coat of paint and the old, yellowed layer becomes visible. Oil paints, in particular, are susceptible to this problem, while water-based paints are hardly affected. This yellowing usually occurs in spaces without sufficient natural light, such as inside cabinets or behind doors. It is not a defect in the paint itself but a natural process in the curing of oil paint.

Why does paint yellow?

Much of the interior painting in homes is done with oil paint, especially on baseboards, doors, and cabinets. Due to the natural curing cycle of oil, yellowing occurs over time. This discoloration becomes particularly evident with varnishes and white or light-colored paints.

Factors that accelerate the yellowing process include:

• Low temperatures
• High humidity
• Exposure to ammonia (e.g., in cleaning products)

Yellowing can also be accelerated by a lack of natural light, known as dark yellowing. The good news is that this yellowing can often be reversed by exposure to sunlight.

How can I minimize yellowing?

While all oil paints will yellow over time, there are steps you can take to slow down the process:

1. Do not paint in low temperatures and avoid high humidity, as this can affect the paint.
2. Ensure good ventilation and sufficient natural light in the room.
3. Allow the enamel paint to dry for at least 48 hours before painting the surrounding walls, or paint the walls first and wait to apply the enamel.
4. Avoid cleaning products containing ammonia near fresh paintwork.
5. Do not use oil paint on surfaces with little light.
6. Consider a water-based paint like LAK HYDRO for a yellowing-free result.

How can I reverse yellowing?

If yellowing is due to insufficient light, exposure to natural light can gradually reverse the discoloration. However, this process may take some time.

If the yellowing is caused by poor ventilation or ammonia, the only solution is to repaint. In that case, use LAK HYDRO, a durable water-based paint that virtually does not yellow.

Conclusion

Yellowing of oil paint is a natural process, but there are ways to minimize it. Choose water-based paints like LAK HYDRO to prevent yellowing and ensure good light and ventilation conditions.