Bamboo Leaf Powder Processing for Stable Emerald Color
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Solution Overview
Problem
Existing tea powders, such as Matcha and green tea powders, face challenges in maintaining stable nutrient content, avoiding heavy metal and pesticide residues, and microbial growth, while achieving ultrafine particle size and emerald color, which are not adequately addressed by current production methods.
Innovation Solution
The preparation of MATZHU involves using fresh bamboo leaves from specific bamboo species, treated with zinc sulfate or zinc gluconate solutions to stabilize chlorophyll, followed by blanching, drying, and superfine grinding to achieve a stable emerald color and high fiber content, using high-energy nano-impact grinding with zirconium balls to ensure uniform fineness and safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional stone milling is used to maintain low speed and low temperature, then the color and flavor of Matcha are preserved, but the production efficiency is low and the particle size fineness is limited
Solution Approach 1:
The patent replaces traditional mechanical stone milling with high-energy nano-impact grinding technology. This substitution uses impact force rather than friction to achieve particle size reduction, enabling ultrafine grinding (D50: 1.3-18.0 μm) while maintaining low temperature and preventing heat generation that would degrade color and flavor. The nano-impact mechanism achieves both high fineness and preserves sensory qualities without the limitations of conventional mechanical systems.
2Stability of the object's composition
If chlorophyll is not stabilized during processing, then the natural green color of bamboo leaves is maintained, but the color becomes unstable during storage and processing
Solution Approach 1:
The patent applies parameter changes by treating bamboo leaves with zinc sulfate or zinc gluconate solutions during processing. This chemical treatment converts unstable magnesium-containing chlorophyll into stable zinc-containing chlorophyll derivatives. The zinc substitution maintains the emerald green color while significantly improving stability against heat, light, and oxidation during storage and high-temperature processing, preventing color degradation without requiring extreme preservation conditions.
3Ease of manufacture
If bamboo leaves are processed without zinc salt treatment, then the processing is simple, but the chlorophyll degrades and color stability is poor
Solution Approach 1:
The patent introduces zinc sulfate or zinc gluconate solution as an intermediary substance during the processing of bamboo leaves. This intermediary agent facilitates the conversion of unstable chlorophyll to stable zinc-chlorophyll complexes. The treatment is applied as a simple soaking or spraying step in the processing flow, maintaining ease of manufacture while dramatically improving color stability. The zinc salt acts as a mediator that bridges the simplicity of processing with the stability of the final product.
4Manufacturing precision
If ultrafine grinding is applied to achieve high fineness, then the nutrient absorption is improved, but the heat generation affects the color and flavor
Solution Approach 1:
The patent replaces friction-based mechanical grinding with impact-based nano-grinding technology. This substitution fundamentally changes the energy transfer mechanism from continuous friction (which generates heat) to intermittent impact (which minimizes heat generation). The nano-impact grinding achieves ultrafine particle size (D50: 1.3-18.0 μm) while keeping temperatures low, preserving the emerald color and fresh aroma of bamboo leaves without thermal degradation.
5Reliability
If Matcha production processes are used for bamboo leaves, then the emerald color and health functions are achieved, but the heavy metal and pesticide residues remain a concern
Solution Approach 1:
The patent extracts and eliminates harmful elements by using bamboo leaves from controlled cultivation sources and applying selective processing. The methodology separates the beneficial components (chlorophyll, dietary fiber, antioxidants) from harmful contaminants through careful source selection and processing. The zinc salt treatment and controlled processing environment help prevent contamination while preserving nutritional value, achieving high reliability and safety with minimal heavy metal and pesticide residues.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
MATZHU maintains a stable emerald color and high thermal and light stability, with low heavy metal and pesticide residues, offering a natural source of dietary fiber, antioxidants, and minerals, suitable for food and dietary supplements, and can be used in various food products and high-temperature processes.
Implementation Method 1
treated with zinc sulfate or zinc gluconate solutions to stabilize chlorophyll
Implementation Method 2
superfine grinding, using high-energy nano-impact grinding with zirconium balls to ensure uniform fineness
Implementation Method 3
blanching, drying
Data Source
AI summary
A MATZHU is prepared by using leaves of Gramineae (Graminae) and Bambusoideae plant as raw materials, and has a stable emerald color, and has an average powder particle size of 800 to 10,000 meshes, and has a total amount of dietary fiber of ≥60%, a content of lignin of ≥20% and a content of minerals of ≥7%, and comprises at least three or more bamboo leaf characteristic components, such as orientin, isoorientin, vitexin, isovitexin, adenosine, δ-hydroxylysine and p-coumaric acid. The method for the MATZHU preparation comprises, in turn, performing blanching and color protection, drying and superfine grinding the raw materials. By utilizing the thermal stability and the light stability of the MATZHU, the MATZHU may be used as a raw food material, a functional ingredient, or a dietary supplement.