Pantone Matching System: color control in production
Delta E — the unit by which the difference is measured, not absolute match
Delta E (ΔE) — a numerical expression of the difference between two colors in a color space. Zero means complete match, further — the higher the number, the more noticeable the deviation to the eye. There are three calculation models: obsolete ΔE76, weighted ΔE CMC and modern ΔE 2000 (written as ΔE00) — it is currently considered the most reliable one, because it takes into account the nonlinearity of human perception in different zones of the color circle.
The general rule of perception is: below 1.0 difference is not visible at all, between 1.0 and 2.0 only a trained eye of a technician notices it, above 3.5 — the divergence is obvious to any consumer on the store shelf. But production tolerances are stricter than 'non-perceptibility' — major clients like P&G and Sun Chemical consider ΔE below 1.5 a good result, up to 2.5 — acceptable, and anything above — a defect, even if the difference formally is not visible to the naked eye at short contact with the product.
The tolerance depends significantly on the substrate and material — it is meaningless to equalize printing on coated board and kraft packaging:
| Material / process | Acceptable tolerance ΔE |
|---|---|
| Coated board (melovanaya karta) | 1.5–2.0 |
| Uncoated (uncoated paper) | 2.0–3.0 |
| Kraft / recycled | 3.0–4.5 |
| Plastic | 2.0–3.0 |
Why the same number looks different on coated and uncoated
Coated substrate (glossy, coated) reflects light evenly and almost does not absorb pigment — the color comes out saturated and bright. Uncoated (porous, absorbent) paper partially 'eats' the ink with its fibers, which is why the same recipe gives a more matte, muted, and often noticeably darker result. The difference between PMS 186 C and PMS 186 U is not a typo in the number, but the physics of the interaction between the ink and the surface.
For quality control, this means one thing: the sample must be compared strictly on the same substrate that will be used in the print run, not by looking at a picture in a swatch book of a different type of paper. A technician who approves the color based on a coated sample but prints on kraft paper is making an error even before the press is started.
What comes first — the sample in hand or the numbers in the file
The correct sequence of working with Pantone in production looks like this, and deviating from it is the main source of defects:
- A physical standard is established — a real impression or tint on the target material, not a picture on the screen.
- A spectrophotometer captures numerical coordinates (Lab, LCH) from the standard during calibration under standard D50 or D65 — that is, under the color temperature 5000K, simulating daylight.
- These numbers are passed to production as a technical specification with the allowed ΔE indicated, not simply 'Pantone such-and-such'.
- Each batch is checked with the same spectrophotometer against the digital standard, not visually compared with a swatch book.
In practice, most manufacturers do the opposite: printers visually check against a worn-out fan that has been lying in the workshop for years, completely ignoring digital data. The reason is mundane — not every supplier has a spectrophotometer and a calibrated workspace, and visual checking seems faster and cheaper. It is precisely this gap between 'what should be done' and 'what is actually done' that creates systematic defects, which are then attributed to 'typography specifics'.
Where do discrepancies between batches come from
Even when the color procedure is fully followed, the color of the same ink may 'drift' from batch to batch. Main reasons:
- Unequal ink delivery across the width of the printing sheet — on offset machines, this is one of the most frequent causes of discrepancies ranging from 2 to 10 ΔE units within a single print run.
- Different batches of pigment from the paint supplier — the chemical composition is not identical from factory to factory.
- Wear or replacement of printing rollers, change in pressure, machine speed.
- Different paper humidity and its absorbency, even within the same substrate type.
- Outdated or uncalibrated fan used by the supervisor for visual inspection — over the course of a year, the pigment in the fan fades enough that the reference itself becomes inaccurate.
This can only be minimized through instrumental control at every stage — measuring with a spectrophotometer at the raw material input, during printing, and at the output of the print run, rather than a one-time check of the first impression.
Why the fan is not a standard, but a language, and what to use instead
The Pantone fan was designed as a means of communication between the designer and the printer — a common vocabulary to avoid explaining colors with words like 'warm orange-red.' It was never a metrological standard, and the manufacturer itself acknowledges this: fans require replacement no less than once a year due to fading, and the discrepancy between two copies of the same year's release can reach 5-6 ΔE — a value that for many materials already exceeds the allowable defect threshold.
There is also a technical mismatch at the level of digital tools: Adobe Creative Cloud deviates by approximately 3.8 ΔE00 from the M1-standard Pantone, even though ICC profiles are formally built on M1-measurements. That is, even digital inspection 'by eye' through the monitor screen does not guarantee matching the production standard.
Only a three-element chain guarantees results: a physical standard on the target material, its numerical Lab/LCH coordinates measured by a calibrated spectrophotometer, and a pre-fixed tolerance ΔE for the specific material and process. Everything in the Pantone system — which already includes over 2161 colors in the main palette and more than 2500 in Fashion/Textile — exists precisely as a reference guide, not as a guarantee of physical reproduction. The responsibility for accuracy lies with the measuring equipment and the tolerance protocol, not with the catalog number.
Delta E — the unit by which the difference is measured, not absolute match
Delta E (ΔE) — a numerical expression of the difference between two colors in a color space. Zero means complete match, further — the higher the number, the more noticeable the deviation to the eye. There are three calculation models: obsolete ΔE76, weighted ΔE CMC and modern ΔE 2000 (written as ΔE00) — it is currently considered the most reliable one, because it takes into account the nonlinearity of human perception in different zones of the color circle.
The general rule of perception is: below 1.0 difference is not visible at all, between 1.0 and 2.0 only a trained eye of a technician notices it, above 3.5 — the divergence is obvious to any consumer on the store shelf. But production tolerances are stricter than 'non-perceptibility' — major clients like P&G and Sun Chemical consider ΔE below 1.5 a good result, up to 2.5 — acceptable, and anything above — a defect, even if the difference formally is not visible to the naked eye at short contact with the product.
The tolerance depends significantly on the substrate and material — it is meaningless to equalize printing on coated board and kraft packaging:
| Material / process | Acceptable tolerance ΔE |
|---|---|
| Coated board (melovanaya karta) | 1.5–2.0 |
| Uncoated (uncoated paper) | 2.0–3.0 |
| Kraft / recycled | 3.0–4.5 |
| Plastic | 2.0–3.0 |
Why the same number looks different on coated and uncoated
Coated substrate (glossy, coated) reflects light evenly and almost does not absorb pigment — the color comes out saturated and bright. Uncoated (porous, absorbent) paper partially 'eats' the ink with its fibers, which is why the same recipe gives a more matte, muted, and often noticeably darker result. The difference between PMS 186 C and PMS 186 U is not a typo in the number, but the physics of the interaction between the ink and the surface.
For quality control, this means one thing: the sample must be compared strictly on the same substrate that will be used in the print run, not by looking at a picture in a swatch book of a different type of paper. A technician who approves the color based on a coated sample but prints on kraft paper is making an error even before the press is started.
What comes first — the sample in hand or the numbers in the file
The correct sequence of working with Pantone in production looks like this, and deviating from it is the main source of defects:
- A physical standard is established — a real impression or tint on the target material, not a picture on the screen.
- A spectrophotometer captures numerical coordinates (Lab, LCH) from the standard during calibration under standard D50 or D65 — that is, under the color temperature 5000K, simulating daylight.
- These numbers are passed to production as a technical specification with the allowed ΔE indicated, not simply 'Pantone such-and-such'.
- Each batch is checked with the same spectrophotometer against the digital standard, not visually compared with a swatch book.
In practice, most manufacturers do the opposite: printers visually check against a worn-out fan that has been lying in the workshop for years, completely ignoring digital data. The reason is mundane — not every supplier has a spectrophotometer and a calibrated workspace, and visual checking seems faster and cheaper. It is precisely this gap between 'what should be done' and 'what is actually done' that creates systematic defects, which are then attributed to 'typography specifics'.
Where do discrepancies between batches come from
Even when the color procedure is fully followed, the color of the same ink may 'drift' from batch to batch. Main reasons:
- Unequal ink delivery across the width of the printing sheet — on offset machines, this is one of the most frequent causes of discrepancies ranging from 2 to 10 ΔE units within a single print run.
- Different batches of pigment from the paint supplier — the chemical composition is not identical from factory to factory.
- Wear or replacement of printing rollers, change in pressure, machine speed.
- Different paper humidity and its absorbency, even within the same substrate type.
- Outdated or uncalibrated fan used by the supervisor for visual inspection — over the course of a year, the pigment in the fan fades enough that the reference itself becomes inaccurate.
This can only be minimized through instrumental control at every stage — measuring with a spectrophotometer at the raw material input, during printing, and at the output of the print run, rather than a one-time check of the first impression.
Why the fan is not a standard, but a language, and what to use instead
The Pantone fan was designed as a means of communication between the designer and the printer — a common vocabulary to avoid explaining colors with words like 'warm orange-red.' It was never a metrological standard, and the manufacturer itself acknowledges this: fans require replacement no less than once a year due to fading, and the discrepancy between two copies of the same year's release can reach 5-6 ΔE — a value that for many materials already exceeds the allowable defect threshold.
There is also a technical mismatch at the level of digital tools: Adobe Creative Cloud deviates by approximately 3.8 ΔE00 from the M1-standard Pantone, even though ICC profiles are formally built on M1-measurements. That is, even digital inspection 'by eye' through the monitor screen does not guarantee matching the production standard.
Only a three-element chain guarantees results: a physical standard on the target material, its numerical Lab/LCH coordinates measured by a calibrated spectrophotometer, and a pre-fixed tolerance ΔE for the specific material and process. Everything in the Pantone system — which already includes over 2161 colors in the main palette and more than 2500 in Fashion/Textile — exists precisely as a reference guide, not as a guarantee of physical reproduction. The responsibility for accuracy lies with the measuring equipment and the tolerance protocol, not with the catalog number.
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