The blue mushroom tray is a staple in supermarkets worldwide, primarily because it offers a unique combination of visual marketing and structural protection. While many assume the color is purely for branding, there are several interesting reasons why blue is the industry standard for these containers.

FOOD Packaging

Mushroom Trays

1. The Power of Visual Contrast

The most interesting aspect of the blue tray is how it interacts with the product's appearance:

• Whiteness Enhancement: The vibrant blue color creates a strong chromatic contrast, making the white caps of button mushrooms appear even whiter and cleaner.

• Masking Discoloration: As mushrooms age, they naturally develop brown spots or "bruising." The blue background helps neutralize these yellow-brown tones, effectively masking minor blemishes from a distance and extending the product's visual shelf life for consumers.

2. Strength and Durability

These trays are typically manufactured using HIPS (High-Impact Polystyrene) or RPET (Recycled PET) through a process called thermoforming.

• Structural Integrity: Despite being thin and lightweight, the trays are designed with reinforced corners and a rigid rim to prevent bending or sagging under the weight of stacked pallets.

• Impact Resistance: The "High-Impact" nature of the material ensures that the tray won't crack or shatter if dropped during the fast-paced stocking of supermarket shelves.

• Moisture Barrier: Unlike cardboard, these plastic trays are 100% water-resistant, which is crucial because mushrooms are often stored in high-humidity environments.

3. Expanded Usage: Beyond Mushrooms

While famous for mushrooms, these blue trays are versatile enough for several other delicate produce items:

• Baby Corn: The tray’s length is perfectly suited for standard baby corn ears. It protects the fragile tips from snapping and keeps them "healthy and fresh" by preventing moisture loss.

• Plum-like Fruits (Prunes & Cherries): The blue color provides a striking aesthetic for deep-colored fruits like plums or prunes. The rigid walls prevent these soft-skinned fruits from being crushed when multiple units are stacked on a retail display.

• Gourmet Berries: They are often used for larger berries or grapes, where the ventilation around the rim allows for airflow to prevent mold.

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