Colour is one of the strongest visual indicators of fruit quality. For produce that develops red, purple, blue or black hues, these tones are formed by anthocyanins—pigments that intensify as fruit ripens. However, anthocyanins are highly sensitive, making colour loss a frequent post‑harvest concern. Once produce enters storage or transit, small environmental changes can quickly affect pigment stability and visual appeal.

Why anthocyanins fade

Anthocyanins are easily disrupted by shifts in their surrounding environment. Key factors that accelerate pigment breakdown include:

• pH changes that alter pigment structure
• Temperature variation during handling or storage
• Light exposure, which increases oxidative stress
• Ethylene, which triggers enzymes involved in pigment degradation

In fruits such as red and black grapes, ethylene can activate oxidative pathways that speed up anthocyanin decay. The result is fading, browning and a noticeable loss of vibrancy—directly impacting perceived freshness and market value.

How RYPEN helps maintain colour

RYPEN supports colour stability by gently moderating ethylene, slowing ripening without interfering with natural flavour or aroma development. This controlled slow‑down helps preserve anthocyanin structure and delay colour loss.

With RYPEN, produce benefits from:

• Slower, more even colour development
• Reduced pigment breakdown during storage
• Longer retention of bright, appealing hues
• Improved consistency across the supply chain

By stabilising the ripening environment, RYPEN protects the visual qualities that consumers rely on when choosing fresh fruit.

Laetitia Plums

An independent trial with Laetitia plums demonstrated the impact of RYPEN on colour preservation. When implemented:

• Ripening occurred more gradually
• Darker anthocyanin-based tones developed evenly
• Red hues were retained for longer, instead of quickly shifting to overripe purple shades
• Shelf-life and market readiness improved

This shows how controlled ethylene management can make a measurable difference in colour retention for anthocyanin rich fruit.

Why colour retention matters

Colour isn’t only aesthetic—it signals freshness, ripeness and the condition of the fruit. When pigmentation fades prematurely, consumer confidence drops and more fruit risks being downgraded or wasted.

By helping stabilise anthocyanins, RYPEN supports stronger visual appeal, higher quality perception and reduced post‑harvest losses—ensuring produce reaches consumers looking as vibrant as when it was picked.