Marking Ink: Particle Size <5 microns

Q: What makes marking ink different from regular printing ink?

Marking ink is specifically formulated to withstand electronics manufacturing processes including high-temperature reflow soldering (up to 260°C), chemical exposure during cleaning, and mechanical stress during handling, while maintaining excellent adhesion to ceramic substrates.

Q: How long does marking ink take to cure on resistors?

Curing time depends on the formulation: thermal-cure inks typically require 20-30 minutes at 120-150°C, while UV-cure inks cure in 1-5 seconds under appropriate UV light exposure, making them suitable for high-speed production lines.

Q: Can marking ink be removed or modified after application?

No, properly cured marking ink forms a permanent bond with the ceramic substrate and cannot be removed without damaging the resistor. This ensures traceability and prevents counterfeiting throughout the component's lifecycle.

Component Specifications

Definition

Marking ink is a specialized printing material used in electronics manufacturing to apply permanent identification codes, logos, batch numbers, and specifications directly onto surface mount resistors. These inks are formulated to withstand high-temperature reflow soldering processes, environmental exposure, and mechanical handling while maintaining excellent adhesion to ceramic substrates and legibility throughout the product lifecycle.

Working Principle

Marking ink operates through precise deposition onto resistor surfaces using printing technologies (typically pad printing or inkjet), followed by curing through thermal or UV processes. The ink forms a durable, chemically resistant layer that bonds with the ceramic substrate, creating permanent markings that remain readable despite subsequent manufacturing steps and operational conditions.

Materials

Formulated with epoxy resins, polyurethane, or silicone bases; inorganic pigments (typically black, white, or colored oxides); solvents (alcohols, ketones, or glycol ethers); and additives for adhesion promotion, viscosity control, and thermal stability. Lead-free and halogen-free formulations are standard for RoHS compliance.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Adhesion	≥4B per ASTM D3359
Viscosity	200-500 cP at 25°C
Shelf Life	6-12 months at 15-25°C
Particle Size	<5 microns
UV Curing Time	1-5 seconds under 365nm UV light
Thermal Stability	Withstands 260°C for 10 seconds (reflow simulation)
Curing Temperature	120-150°C for 20-30 minutes
Chemical Resistance	Withstands IPA, flux cleaners, and mild acids

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Standards

ISO 9001, ISO 14001, IEC 60068, IPC-4101, J-STD-001

Parent Products

This component is used in the following industrial products

Surface Mount Resistor

Passive electronic component for current limiting and voltage division in circuits

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Engineering Analysis

Risks & Mitigation

Incomplete curing leading to smudging
Poor adhesion causing marking loss during handling
Ink contamination affecting electrical properties
Color fading under UV exposure
Viscosity changes affecting print quality

FMEA Triads

Trigger: Incorrect viscosity adjustment
Failure: Poor print definition and smearing
Mitigation: Implement viscosity monitoring systems and regular calibration of ink properties

Trigger: Inadequate curing parameters
Failure: Marking rubs off during subsequent processes
Mitigation: Establish validated curing profiles and implement real-time temperature monitoring

Trigger: Substrate contamination
Failure: Poor ink adhesion and marking defects
Mitigation: Implement pre-printing cleaning processes and contamination control protocols

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

±5% viscosity, ±2°C curing temperature, ±0.5mm print registration

Test Method

ASTM D3359 for adhesion, IPC-TM-650 for chemical resistance, IEC 60068 for environmental testing, RoHS directive for hazardous substances

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

Check the legal entity, factory address, ownership, certifications, and direct contacts.

CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Manufacturers of Marking Ink

Manufacturer profiles associated with Marking Ink.

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Frequently Asked Questions

What makes marking ink different from regular printing ink?