A Practical Whitepaper for New Printers
Ink Systems
1. Introduction
Color matching is one of the most critical—and often misunderstood—aspects of lithographic printing. Achieving consistent, repeatable color requires more than simply selecting the right ink. It involves controlling a system of variables including ink formulation, substrate, press conditions, and environmental factors.
This whitepaper provides a foundational understanding of how color matching works in offset printing and outlines best practices to help new printers achieve reliable results.
2. What is Color Matching?
Color matching is the process of reproducing a target color—such as a brand color or proof standard—consistently across print runs.
This typically involves:
- Matching to a Pantone® reference
- Matching to a press proof or drawdown
- Matching across multiple jobs or reprints
Success is measured by how closely the printed result visually and instrumentally matches the target.
3. The Three Pillars of Color Matching
1. Ink
The ink must be:
- Correctly formulated
- Consistent from batch to batch
- Appropriate for the substrate and press conditions
Even small variations in pigment or varnish can affect final color.
2. Substrate
Paper (or other material) has a major impact on color:
- Coated vs. uncoated surfaces
- Brightness and shade (blue-white vs. natural)
- Absorbency
👉 The same ink will look different on different substrates.
3. Press Conditions
Key variables include:
- Ink film thickness
- Water (fountain solution) balance
- Press speed and pressure
Color cannot be matched if press conditions are inconsistent.
4. Understanding Color Systems
Pantone Matching System (PMS)
- Industry standard for spot colors
- Provides physical references for color targets
- Widely used for brand consistency
Process Color (CMYK)
- Uses Cyan, Magenta, Yellow, and Black
- Builds colors through dot patterns (halftones)
- Less precise than spot color for exact matches
Drawdowns
A drawdown is:
- A controlled sample of ink on substrate
- Used as a visual standard before going to press
Always compare press output to a drawdown, not just a swatch book.
5. The Role of Ink Film Thickness
Color strength is directly related to how much ink is applied.
- Too little ink → weak, washed-out color
- Too much ink → dark, muddy, drying issues
Consistency is more important than absolute thickness.
6. Ink & Water Balance
Lithographic printing relies on the balance between ink and water.
Too Much Water
- Reduces color strength
- Causes emulsification
- Leads to inconsistent color
Too Little Water
- Causes scumming
- Dirties non-image areas
Stable color requires a stable ink-water balance.
7. Lighting & Viewing Conditions
Color perception changes depending on lighting.
Standard Viewing Conditions
- Use D50 lighting (5000K)
- Avoid mixed light sources (sunlight + fluorescent)
Metamerism
Some colors match under one light source but not another.
Always evaluate color under controlled lighting conditions.
8. Instrumental vs. Visual Matching
Visual Matching
- Based on human perception
- Influenced by lighting, fatigue, and surroundings
Instrumental Matching
- Uses devices like spectrophotometers
- Measures color using values (e.g., Lab*)
Best practice:
- Use instruments for accuracy
- Use eyes for final approval
9. Common Challenges in Color Matching
| Challenge | Cause | Solution |
|---|---|---|
| Color too weak | Low ink film / excess water | Increase ink, reduce water |
| Color too dark | Excess ink | Reduce ink film |
| Color shift between runs | Inconsistent press setup | Standardize conditions |
| Poor match to Pantone | Wrong formulation | Verify ink recipe |
| Variation across sheet | Ink distribution issues | Adjust rollers/settings |
10. Best Practices for Consistent Results
Standardize Your Process
- Use consistent substrates
- Maintain press settings
- Control environment
Document Everything
Track:
- Ink batch numbers
- Additives used
- Press settings
This ensures repeatability.
Use Drawdowns
- Always approve ink before press
- Use the same substrate as production
Communicate Clearly
- Define the target (Pantone, proof, sample)
- Align expectations with customer
11. The Ink Systems Approach
At Ink Systems, color matching is not just about supplying ink—it’s about delivering consistency.
We provide:
- Controlled formulations
- Batch-to-batch consistency
- Technical support for press optimization
Our goal is to ensure your color matches the first time—and every time after.
12. Conclusion
Color matching is a system—not a single variable. Success comes from controlling ink, substrate, press conditions, and environment together.
By standardizing processes and following best practices, even new printers can achieve professional, repeatable results.
Need Help?
If you need assistance with color matching, troubleshooting, or custom formulations:
Contact Ink Systems Technical Support