The preparation scheme of ink thinner, the average person I do not tell him

Gravure printing demands precise ink thinner configurations to ensure optimal print quality and efficiency. The success of plastic film printing—whether it runs smoothly or produces high-quality output—largely depends on the correct setup of the ink thinner, especially in gravure printing. The concentration and viscosity of the gravure ink directly affect color accuracy, pattern clarity, and even the printing speed. Therefore, adjusting the ink thinner ratio is a critical step that should not be overlooked. Different types of inks require specific solvents, and the proportions of these solvents must be adjusted based on environmental conditions such as temperature and humidity, as well as the printing equipment, speed, and plate roller used. Since gravure printing machines vary widely in performance, it's essential for packaging and printing companies to tailor the ink thinner ratio according to their specific situation—including the type of ink, the skill level of operators, and the machinery in use. To help operators with this process, four matching solvent schemes are provided for reference. These formulas are suitable when the printing room temperature is around 20°C and the printing speed ranges from 50 to 100 meters per minute. **Plastic Gravure Ink Thinner Ratios:** - **Quick-drying solvent:** Ethyl acetate 20%, Toluene 80% - **Intermediate solvent:** Ethyl acetate 20%, Toluene 80% or 100% - **Slow-drying solvent:** Ethyl acetate 20%, Xylene 80% - *Note: Avoid alcohol-based solvents. If humidity is high, add 5%–20% Methyl Ethyl Ketone.* **Surface Printing Plastic Gravure Ink Thinner Ratios:** - **Quick-drying solvent:** Ethyl acetate 20%, Toluene 40%, Isopropyl Alcohol 40% - **Intermediate solvent:** Ethyl acetate 5%, Toluene 55%, Isopropyl Alcohol 40% - **Slow-drying solvent:** Xylene 50%, Isopropyl Alcohol 50% - **Very slow-drying solvent:** Xylene 50%, Isopropyl Alcohol 50%, n-Butanol 1%–3% **Alcohol-Soluble Plastic Gravure Ink Thinner Ratios:** - **Quick-drying solvent:** Ethyl Acetate 50%, Absolute Ethanol 50% - **Intermediate solvent:** Ethyl Acetate 20%, Isopropyl Alcohol 80% - **Slow-drying solvent:** 50% Absolute Ethanol, 50% Propyl Acetate **Cooking Plastic Gravure Ink Thinner Ratios:** - **Quick-drying solvent:** Ethyl Acetate 30%, Isopropyl Alcohol 20%, Butanone 50% - **Intermediate solvent:** Isopropyl Alcohol 10%, Toluene 40%, Butanone 50% - **Slow-drying solvent:** Toluene 60%, Methyl Ethyl Ketone 35%, Propylene Glycol Methyl Ether 5% By following these guidelines, printers can achieve better consistency, reduce waste, and improve overall production efficiency. It's always recommended to conduct small-scale tests before full production to ensure compatibility and performance under real-world conditions.

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