Introduction In high-speed industrial printing environments, ink drying time is a critical factor that influences not only the final appearance of the printed code but also operational efficiency and product quality. Whether you’re using Continuous Inkjet (CIJ), Thermal Inkjet (TIJ), or Drop-on-Demand (DOD) systems, choosing the correct ink drying time can mean the difference between sharp, smudge-free prints and costly rework or downtime. — 1. What Is Ink Dry Time? Dry time refers to the period it takes for ink to set or cure on a substrate surface after application. It can range from a fraction of a second to several minutes, depending on the ink formulation and environmental factors. There are two key stages: Surface dry – When the ink no longer smears under light touch Fully cured – When the ink is chemically or physically stable and resistant to handling or environmental stress — 2. Factors That Influence Ink Drying Time Several variables can affect how quickly or slowly ink dries, including: Solvent base: MEK-based inks dry faster than water-based or glycerin-based alternatives Ambient conditions: Humidity, airflow, and temperature impact evaporation rate Substrate type: Porous surfaces (e.g., cardboard) absorb ink, while non-porous ones (e.g., glass, plastic) require faster-drying formulations Ink thickness: Thicker ink deposits naturally take longer to dry Printing speed: High-speed lines demand quick-drying inks to prevent transfer or smudging — 3. Smudge Resistance vs. Drying Speed There is a direct correlation between dry time and smudge resistance. Inadequate drying leads to: Blurred or illegible prints Transfer

Introduction The Material Safety Data Sheet (MSDS) — also referred to as SDS (Safety Data Sheet) — is an essential document accompanying every industrial ink product. It provides crucial safety, environmental, and regulatory information for handling, storage, transport, and disposal of inkjet inks. For users of CIJ, TIJ, DOD, and TTO inks, understanding the MSDS ensures compliance, minimizes risk, and supports workplace safety. — 1. What Is an MSDS and Why Does It Matter? An MSDS is a technical document that communicates the properties of a chemical substance. In the context of inkjet printing, the MSDS is vital for: Protecting operators from chemical exposure Ensuring legal compliance (e.g., OSHA, REACH, GHS) Informing safe storage and emergency response Classifying inks as hazardous or non-hazardous — 2. Key Sections of an MSDS for Ink Products An ink MSDS typically contains the following standardized 16 sections: Identification: Product name, use, supplier, emergency contact Hazard Identification: GHS pictograms, signal words, risk phrases Composition/Ingredients: Chemical name, CAS number, concentrations First-Aid Measures: Eye, skin, inhalation, and ingestion response Fire-Fighting Measures: Flash point, extinguishing agents, hazards Accidental Release Measures: Spill containment and clean-up procedures Handling and Storage: Safe handling, compatible materials, temperature range Exposure Controls/Personal Protection: PPE, ventilation requirements Physical and Chemical Properties: Appearance, odor, pH, solubility, boiling point Stability and Reactivity: Conditions to avoid, incompatibilities Toxicological Information: Acute/chronic health effects, LD50 values Ecological Information: Environmental impact and degradability Disposal Considerations: Waste treatment and disposal regulations Transport Information: UN number, shipping class, IMDG, IATA Regulatory Information: Chemical

Introduction Switching ink types in a Continuous Inkjet (CIJ) printer — for example, from dye-based to pigmented ink or from MEK to ethanol-based solvent — requires proper flushing to avoid chemical reactions, print defects, and damage to the printer system. This article provides a professional, SEO-optimized guide to flushing procedures and tips for a clean and safe ink transition. — 1. When Is Ink Flushing Necessary? Changing between ink formulas (e.g., MEK to ethanol) Switching colors (especially between black, white, and yellow) Seasonal shutdown or long-term storage Preventive maintenance routines Failing to flush the system can result in pigment clogging, pH imbalance, or coagulation, leading to performance issues or permanent damage. — 2. Essential Materials Needed Recommended flushing solution (compatible with current ink type) Personal protective equipment (PPE): gloves, goggles, mask Clean lint-free cloth Waste container for drained ink and solvent New ink bottle (sealed) Tip: Only use flushing solutions designed for your specific ink family (e.g., Cheef’s C-V901 for MEK-based inks). — 3. Step-by-Step Ink Flushing Procedure Step 1: Printer Shutdown Power off the printer safely using system controls Allow pressure to release from the ink circuit Step 2: Drain Existing Ink Open the ink tank valve and drain into a proper waste container Ensure all ink is removed from tubes and filter lines Step 3: Fill with Flushing Solution Pour the flushing solvent into the ink tank Run the printer in cleaning or purge mode to circulate the solution Repeat purge until solvent output is clear (no ink

Introduction In the world of Continuous Inkjet (CIJ) printing, ink composition plays a vital role in determining print quality and substrate compatibility. Among the most important distinctions is whether an ink is pigmented or dye-based. This article outlines the technical, operational, and cost differences between pigmented and dye-based CIJ inks and helps you choose the right one based on your application needs. — 1. What Are Pigmented Inks? Pigmented inks contain solid color particles that are suspended in the liquid solvent. These particles sit on the surface of the substrate, providing strong contrast and durability. Common pigments include titanium dioxide (for white inks), carbon black, and colored metal oxides. Advantages: High opacity – excellent visibility on dark or transparent materials Superior UV and chemical resistance Long-lasting, fade-resistant marks Challenges: Higher viscosity, requiring specialized printers and filters Frequent agitation needed to prevent sedimentation More demanding on printer maintenance — 2. What Are Dye-Based Inks? Dye-based inks use soluble colorants dissolved in the solvent. They soak into porous materials and provide vibrant colors, but with less opacity and durability compared to pigmented inks. Advantages: Simpler to use and maintain Lower cost per liter Fast drying on porous substrates like paper or cardboard Limitations: Not suitable for dark or non-absorbent surfaces Can fade under UV exposure or wash off with chemicals — 3. Performance Comparison Table Property Pigmented Ink Dye-Based Ink Contrast on Dark Surfaces Excellent Poor UV Resistance High Low to Moderate Maintenance Requirements High (agitation, filters) Low Cost Higher Lower Typical

Introduction Plastic packaging is one of the most common substrates in the packaging industry, used widely in food, beverage, pharmaceutical, and cosmetic sectors. However, printing on plastic presents unique challenges due to its smooth, non-porous surface and potential chemical reactivity. Choosing the correct CIJ (Continuous Inkjet) ink is critical to achieving durable, legible, and compliant codes. This article explores how to evaluate and select CIJ inks specifically formulated for plastic packaging applications. — 1. Understanding Plastic Substrates Common types of plastic used in packaging include: PE (Polyethylene) – Flexible films, bags, and bottles PP (Polypropylene) – Food trays, medical packaging PET (Polyethylene Terephthalate) – Beverage bottles PVC (Polyvinyl Chloride) – Blister packs, shrink films HDPE/LDPE – Chemical containers and milk bottles These plastics vary in their surface energy, chemical reactivity, and compatibility with ink solvents. Some require special ink formulations for optimal adhesion. — 2. Key CIJ Ink Requirements for Plastic Fast Drying Time: Prevent smudging during high-speed production Strong Adhesion: Resistant to rubbing, heat, and water Chemical Resistance: Withstand oils, alcohol, or acids UV Resistance: Maintain legibility over time in sunlight Non-Migrating: Safe for food-contact surfaces Formulations often include MEK, ethanol, or acetone as carriers due to their rapid evaporation and compatibility with non-porous materials. — 3. Recommended CIJ Ink Types by Plastic Plastic Type Recommended Ink Features PET MEK-based fast-dry ink Quick drying, high adhesion, smudge-resistant PP/PE Special adhesion-enhanced ink Designed for low-surface-energy substrates HDPE/LDPE Soft-solvent pigmented ink Good contrast and chemical resistance PVC Ketone-based dye ink Stable

Introduction Thermal Inkjet (TIJ) and Continuous Inkjet (CIJ) are two dominant technologies in the industrial coding and marking industry. While both are used to print batch codes, expiry dates, barcodes, and logos, they operate on fundamentally different principles — and so do their inks. This article explores the chemical formulation differences between TIJ and CIJ inks, and how these differences influence performance, cost, maintenance, and application suitability. — 1. Basic Technology Comparison Aspect CIJ TIJ Printing Mechanism Ink is continuously ejected through a nozzle using high pressure and diverted electrostatically Ink is ejected in drops by rapidly heating a resistor in a cartridge Ink Container Large ink bottles + make-up solvent Compact ink cartridges (30–45ml) Environment High-speed production lines Low-to-medium-speed applications — 2. Ink Chemistry Differences CIJ Ink Composition: Solvent base: MEK, acetone, or ethanol (fast-drying) Colorants: Dyes or pigments (for darker substrates) Additives: Conductivity agents, anti-clogging agents, binders TIJ Ink Composition: Water or solvent base: Ethanol or glycol ethers (less volatile) Colorants: Pigments for permanence or dyes for cost-effectiveness Surface tension modifiers: For smooth ejection and droplet control — 3. Key Performance Differences | Property | CIJ Ink | TIJ Ink | |———-|———|———| | Drying Speed | Very fast (1–2 sec on plastic/metal) | Moderate to fast (2–5 sec) | | Adhesion | Excellent on non-porous surfaces | Depends on ink type | | Smell/Volatility | Strong (due to MEK) | Low odor (water or ethanol) | | Cartridge Design | Large system with filters and reservoirs | All-in-one

Introduction Industrial inkjet inks — whether for CIJ, TIJ, DOD, or high-resolution systems — must be stored and used within their specified shelf life to ensure consistent print quality, chemical stability, and safety. Each ink bottle or cartridge comes with a batch number and expiration label. Knowing how to interpret this information allows you to: Verify product freshness before use Track manufacturing origin and lot consistency Comply with audits or customer traceability requirements This article explains how to read and use batch codes and shelf-life indicators effectively. — 1. What Is a Batch Number? A batch number (or lot code) is a unique identifier assigned by the manufacturer at the time of production. It usually includes: Factory ID or location code Date of manufacture (in coded or readable form) Batch sequence for that production day For example, a Cheef ink might show: Batch No: CJ23A3105 This could be decoded as: CJ – CIJ-compatible ink 23A – Year 2023, Batch Code A 3105 – Day 105 of the year (mid-April) — 2. Where to Find Batch and Shelf Life Info? You’ll typically find it printed on: Ink bottle or cartridge label Outer box packaging Product COA (Certificate of Analysis), if provided Label Example: Ink Type: Solvent Black Part No: CJ-SP302A Batch No: CJ24B0127 MFG Date: 2024-05-06 EXP Date: 2025-05-05 — 3. Understanding Shelf Life Standard shelf life for CIJ and DOD inks: 12–18 months TIJ cartridges: 6–12 months, depending on brand MEK-based inks degrade faster than water-based inks Shelf life is