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

Introduction Ink contamination is one of the leading causes of print defects, nozzle clogging, fluid instability, and system breakdowns in industrial inkjet systems. Whether you’re using CIJ, TIJ, or DOD printers, even minor exposure to dust, incompatible chemicals, or water can compromise ink performance. This guide outlines practical, proven steps to prevent ink contamination during refilling, servicing, and fluid handling — protecting both your ink and your equipment. — 1. What Causes Ink Contamination? Using dirty funnels, bottles, or tubing during refills Leaving ink bottles open or unsealed Mixing old and new ink without compatibility testing Accidental water ingress (especially from humid air or washdowns) Using expired ink or contaminated cartridges Improper filter changes or bypassing filtration — 2. Symptoms of Contaminated Ink | Symptom | Cause | |———|——-| | Grainy or fuzzy characters | Dust or pigment coagulation | | Nozzle clogs and misfires | Dried ink residue or particles | | Color shift or fading | Chemical instability or dilution | | Poor adhesion | Water contamination or pH shift | | Frequent purging | Ink fouling or bacterial growth | — 3. Refilling Best Practices (CIJ and DOD) Only refill in clean, dust-free environments Use dedicated refill containers — no food or chemical reuse Wear gloves, and avoid direct skin or air exposure to open ink tanks Wipe spouts and tank openings with lint-free cloth before sealing Flush the system before changing ink types or brands — 4. Cartridge Handling Tips (TIJ) Keep cartridges sealed until use

Introduction Inkjet inks — especially those used in CIJ, TIJ, DOD, and High-Resolution systems — are chemically sensitive. Exposure to extreme temperatures during storage or transportation can cause serious damage, including: Viscosity changes Pigment separation or clumping Ink expansion or container rupture Loss of adhesion or print quality This article explains how to assess ink condition after freezing or overheating and what recovery or disposal steps to take. — 1. What Happens When Ink Freezes? Key Risks: Separation of solvents and resins Pigment settling and flocculation Cracked cartridges (TIJ) or expanded bottles (CIJ/DOD) Ink becomes unusable after thawing Signs of Freeze Damage: Clumps or white specks inside the ink Color change or uneven consistency Crystallized residue around the nozzle or seal — 2. What Happens When Ink Overheats? Key Risks: Volatilization of solvents (MEK, ethanol, acetone) Loss of viscosity control → overspray, poor print definition Ink container deformation or leakage Reduced shelf life or stability Signs of Heat Damage: Unusually thin or watery consistency Loss of color density Leaking or pressurized cartridges (TIJ) — 3. Recovery Steps After Freezing ✅ Try This (Only for Water-Based or Ethanol Inks): Bring the ink to room temperature slowly (do not heat) Gently shake or rotate sealed bottle — do not stir with objects Print a test pattern to assess coverage, adhesion, and clarity ❌ Do NOT: Use heat guns or hot water baths Shake pigment ink vigorously (may damage suspension) Use CIJ ink after freezing — likely unrecoverable — 4. Recovery Steps After

Introduction Industrial inkjet inks are sensitive chemical formulations. Improper storage can lead to ink degradation, pigment settling, separation, viscosity changes, or even chemical reactions. Whether you use CIJ, TIJ, DOD, or high-resolution systems, proper storage ensures longer shelf life, consistent print quality, and lower maintenance costs. This guide outlines how to store different ink types correctly — including temperature, packaging, labeling, and handling best practices. — 1. Why Proper Ink Storage Matters Preserves chemical stability (e.g., pH, viscosity, conductivity) Prevents pigment settling or separation Reduces risk of nozzle clogging or print failures Ensures regulatory compliance for flammable goods — 2. General Storage Conditions Storage Factor Recommended Practice Temperature 10–30°C (50–86°F) – avoid freezing or overheating Humidity Below 65% RH – avoid damp or condensation Light Store in original opaque containers away from sunlight Ventilation Well-ventilated, no direct heat sources or ignition Shelf orientation Upright position – don’t store cartridges or bottles sideways — 3. Storage by Ink Type | Ink Type | Storage Note | Risk if Mishandled | |———-|————–|——————–| | **CIJ (MEK-based)** | Flammable – store in fireproof cabinets | Pressure buildup, evaporation, separation | | **TIJ Cartridges** | Factory-sealed – avoid high heat/freeze | Bubble formation, nozzle clog | | **DOD Pigment Inks** | Agitate every 3–4 weeks if stored long-term | Particle settling, nozzle abrasion | | **High-Res UV Inks** | Light-sensitive – must be kept in dark | Premature curing, instability | — 4. First-In, First-Out (FIFO) Rotation Always use older batches before newer ones. Label

Introduction Environmental conditions, especially temperature and humidity, play a critical role in inkjet printing performance. Changes in temperature or moisture levels can affect ink viscosity, drying speed, adhesion, nozzle behavior, and overall print consistency. Whether you use CIJ, TIJ, DOD, or High-Resolution printers, understanding and controlling the environment can dramatically improve printing quality and reduce downtime. — 1. How Temperature Affects Ink Performance Low Temperature (Below 10°C / 50°F): Increased viscosity — ink becomes thicker Slower ink flow — may cause drop deflection issues in CIJ Delayed drying time — smudging risk increases TIJ cartridges may fail to eject properly (thermal bubble issues) High Temperature (Above 35°C / 95°F): Reduced viscosity — may cause overspray or splatter Faster solvent evaporation — shortens open time Potential ink degradation if stored improperly CIJ make-up fluid consumption increases Storage Warning: Extreme heat can alter chemical balance in ink — affecting color, conductivity, or even causing phase separation (especially in pigment inks). — 2. How Humidity Affects Ink Behavior Low Humidity (Below 30% RH): Increased evaporation — printheads dry faster Frequent nozzle clogging, especially in CIJ and TIJ Shorter inkjet open time — requires more flushing High Humidity (Above 70% RH): Slow drying — prints may smudge or transfer Ink may absorb ambient moisture — affects pH or drying curve Barcodes and QR codes may blur on porous materials — 3. Impact by Printer Type | Printer Type | Effect of Temperature | Effect of Humidity | |————–|————————|———————| | **CIJ** | Viscosity fluctuation affects