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Judging criteria for different grades of dried shiitake mushrooms
The grade of dried shiitake mushrooms is mainly based on their appearance, size, shape, color, fragrance and dryness. Here are some common judging criteria:
1. Appearance
Integrity: High-grade dried shiitake mushrooms require complete mushroom bodies, without damage, insect bites and mold spots. Low-grade dried shiitake mushrooms may have partial damage or defects.
Surface smoothness: High-grade dried shiitake mushrooms have a smooth surface without obvious cracks or roughness. Low-grade dried shiitake mushrooms may have uneven surfaces, cracks or roughness.
2. Size
Diameter: The diameter of high-grade dried shiitake mushrooms is usually more than 4 cm and uniform in size. Low-grade dried shiitake mushrooms have a smaller diameter and vary in size.
Thickness: The cap of high-grade dried shiitake mushrooms is thick and the meat is full. Low-grade dried shiitake mushrooms may have a thin cap and the meat is not firm enough.
3. Shape
Cap shape: The cap of high-grade dried shiitake mushrooms is hemispherical or round, with inward-rolled edges. The cap of low-grade dried shiitake mushrooms may be irregular, with flat or outward-rolled edges.
Shape of the stem: The stem of high-grade dried shiitake mushrooms is short and sturdy, and the proportion is coordinated with the cap. Low-grade dried shiitake mushrooms may have long and thin stems, which are not coordinated enough.
4. Color
Color uniformity: The color of high-grade dried shiitake mushrooms is uniform and dark brown or chestnut. Low-grade dried shiitake mushrooms are uneven in color and may have white spots or other spots.
Glossiness: High-grade dried shiitake mushrooms have a natural gloss and the surface is not dry. The surface of low-grade dehydrated shiitake mushrooms may be dull.
5. Aroma
Aroma intensity: The aroma of high-grade shiitake mushrooms is strong and has a unique aroma of dehydrated shiitake mushrooms. Low-grade shiitake mushrooms have a lighter aroma or have a strange smell.
Freshness: High-grade dried shiitake mushrooms maintain their natural aroma without mold or odor. Low-grade dried shiitake mushrooms may have a moldy or other odor.
6. Dryness
Dryness: High-grade dried shiitake mushrooms have a high degree of dryness and feel dry. Low-grade shiitake mushrooms may have a high humidity and feel damp.
Water content: High-grade shiitake mushrooms have a low water content and are suitable for long-term storage. Low-grade shiitake mushrooms have a high water content and are easy to deteriorate.
7. Impurity content
Few impurities: High-grade dehydrated shiitake mushrooms contain almost no impurities, such as
soil, stones or other debris. Low-grade shiitake mushrooms may contain more impurities and need to be cleaned.
8. Other indicators
Cap cracking degree: The cap cracking degree of high-grade dehydrated shiitake mushrooms is moderate, which does not affect the appearance and taste. The cap cracking of low-grade shiitake mushrooms is serious, affecting the appearance.
Gill color: The gill color of high-grade dried shiitake mushrooms is white or light yellow, clean and spotless. The gill color of low-grade shiitake mushrooms is dark or spotted.
Through the evaluation of the above aspects, the grade of dried shiitake mushrooms can be comprehensively determined to provide quality assurance for consumers. High-grade dried shiitake mushrooms not only have advantages in appearance and taste, but also have excellent nutritional value and use effect, and are suitable for use as high-end ingredients.
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