August 15, 2026
Itinbox®
A customer gives us a Pantone number.
The artwork is correct. The designer has checked the colour. A Pantone book is sitting on the buyer’s desk.
Then the printed tin sample arrives.
The red looks slightly deeper. The blue feels cooler. A colour that appeared completely solid on paper suddenly has a metallic character when the tin is tilted under the light.
The question comes quickly:
“We gave you the Pantone colour. Why doesn’t the tin look exactly like the Pantone sample?”
Anyone who works with printed metal hears some version of this sooner or later.
A Pantone reference gives the printer a common colour target. It does not remove the physical influence of the metal, base coating, ink film, printing sequence, curing, varnish or viewing light.
Paper and tinplate are different surfaces. They reflect light differently, accept ink differently and create different visual effects.
For buyers, the practical lesson is simple:
For an important brand colour, approve the printing process — not just the Pantone number.
Pantone Starts the Colour Conversation
Take Pantone 186 C as an example.
That number gives the designer, buyer, ink technician and press operator a common reference. It is far more useful than asking for “a strong red” or sending a screenshot and saying, “Please match this.”
But the Pantone number alone does not tell the factory how the finished tin should look.
Before matching a critical colour, we still need to know:
- Will it be printed over a white base or directly over exposed tinplate?
- Is the colour a dedicated spot ink or a CMYK build?
- Will another colour print underneath or over it?
- Does the design need a metallic effect?
- Will the final surface be gloss or matte?
- What physical sample will be used for final approval?
The Pantone code defines the direction.
The production structure determines how that direction becomes a finished metal package.
See Paper and Tinplate Side by Side
See the two materials next to each other, and the difference becomes obvious.
Paper absorbs and scatters light through its surface and coating. Tinplate does not behave that way.
It is a non-absorbent metal substrate. Metal-decorating inks need to form a controlled film and adhere properly to the prepared surface rather than soaking into fibres as they would on paper.
That changes the way colour reaches your eye.
In the print room, we often put it more simply:
The metal underneath the ink is still part of the colour system.
You are never looking at ink alone.
You are seeing the ink, the surface beneath it and the light reflected back towards you.
That difference becomes especially important when the artwork uses exposed silver metal.
White Base or Exposed Tinplate?
One of the first decisions in Pantone colour matching on tinplate is what sits underneath the coloured ink.
Get this wrong at the artwork stage and the press operator may spend hours trying to solve a problem that really started with the design specification.
Printing Over a White Base
An opaque white coating reduces the influence of the silver tinplate underneath.
The colour usually appears more solid and conventional.
We often consider a white base when:
- Corporate colour consistency matters
- Photographic artwork needs predictable reproduction
- Clean white areas are required
- Food or skin tones appear in the design
- The buyer wants less metallic reflection
A white base does not turn tinplate into paper, but it gives the coloured inks a more neutral foundation.
For a brand trying to reproduce the same red or blue across cartons, labels and metal packaging, that can make colour approval easier.
Letting the Metal Show Through
Another project may need exactly the opposite.
The designer wants the silver tinplate to remain visible through selected areas of the artwork.
A transparent or semi-transparent colour over metal can create a rich metallic appearance without printing a separate metallic ink.
The visual result changes as the tin moves under the light.
A blue may feel brighter at one angle and deeper at another. Red can take on a more metallic, reflective character. Dark colours may gain far more depth than they had on screen.
That can look excellent.
It also means comparing the finished tin directly with a solid Pantone paper swatch is no longer a like-for-like comparison.
Problems usually start when a project asks for both:
“Keep the metallic effect.”
and
“Make it look exactly like the Pantone paper sample.”
Those goals can conflict.
Decide which visual result matters more before the press sample is made.
Spot Colour or CMYK? Ask Before Sampling
A designer places a Pantone colour in the artwork file.
The buyer assumes the factory will automatically mix a dedicated Pantone ink.
That assumption is risky.
A colour may be printed as a dedicated spot colour, or it may be approximated using CMYK process inks.
The two routes work differently.
A spot colour is mixed specifically for the target shade and printed as its own ink.
CMYK builds colour through combinations of cyan, magenta, yellow and black.
For general artwork, a CMYK approximation may be perfectly acceptable.
A signature brand colour deserves more thought.
Imagine a tea company that uses the same dark green across every pack in its range. If that colour carries strong brand recognition, a dedicated spot ink may give the printing team better control than trying to rebuild it through four process colours.
Before sampling, ask one simple question:
“Will this colour run as a spot ink or as CMYK?”
That question is much easier to answer before production than after the buyer has two different-looking samples on the desk.
A Good Drawdown Is Only the Starting Point
Spot-colour matching usually begins before the press starts running.
The ink technician can prepare a formulation and check it through a controlled drawdown.
A drawdown helps evaluate:
- Hue
- Strength
- Basic opacity
- General direction against the target
It is useful work.
But the drawdown is not the finished production result.
Take the same ink onto a real offset press and another set of variables appears.
The colour now depends on:
- Actual ink-film thickness
- Roller settings
- Press speed
- Dampening
- Ink/water balance
- Substrate coating
- Trapping with other colours
- Curing
- Final varnish
A drawdown may look right while the first press sheet still needs adjustment.
That is not unusual.
The ink room gives us the starting colour.
The press tells us what the buyer will actually receive.
For a critical brand shade, a real printed metal sample carries far more weight than a laboratory ink test alone.
Ink/Water Balance Can Move the Colour
Offset printing adds another variable that does not exist in a simple hand drawdown: dampening.
The plate needs a stable balance between ink and fountain solution.
Too much water can weaken colour strength or disturb ink transfer. Too little can create other printing problems.
Once the press reaches a stable condition, the operator has a much better chance of holding the target consistently.
Buyers do not need to manage press chemistry themselves.
They should understand one point:
A correct ink formula can still produce the wrong-looking colour if the press is not running in a stable condition.
That is one reason experienced printers prefer to approve a colour under realistic production conditions rather than relying entirely on an ink-room sample.
Colour Sequence Can Change the Final Appearance
Colour sequence is another factor that rarely appears in general packaging guides.
On a multicolour press, inks are laid down in a particular order.
Where colours overlap, that order can influence the result.
The first ink forms one film. The next ink must transfer onto that printed surface and trap correctly.
Change the sequence and you may change:
- Overprint density
- Trapping
- Contrast
- Neutral balance
- Colour contamination
- The appearance of a mixed area
There is no useful universal rule saying black must always run first or a Pantone colour must always run last.
The correct order depends on the artwork, ink tack, press configuration, coverage and production method.
A design with a large dark process background and a corporate spot colour may require a different sequence from a simple two-colour promotional tin.
For the buyer, the important point is easier:
If a critical colour depends on overprinting, approve it using the colour sequence intended for mass production.
Changing the sequence after sample approval can change the visual result even when the artwork file itself has not changed.
Opacity Can Matter More Than the Original Ink Formula
Some Pantone colours that look straightforward on white paper become harder to reproduce once the same target moves onto metal.
The reason is often not the Pantone formula itself.
It is how much of the surface underneath is still influencing the colour.
If the customer wants a clean, solid corporate blue, the printing structure may need to block most of the silver tinplate from showing through. An opaque white base is often one route.
A different job may need the opposite.
If the brief calls for a metallic blue, covering the metal too heavily removes the very effect the designer wanted.
The printing team may instead adjust the ink formulation, ink-film strength or artwork separation while deliberately allowing some metallic reflection to remain.
There is no useful rule saying that more opacity is always better.
First decide what the finished tin should look like. Then build the ink and base-coat structure around that result.
The Oven Still Has a Say
A printed metal sheet is not necessarily ready for colour approval the moment it leaves the printing unit.
The inks and coatings still need to complete the intended curing process.
Depending on the system, production may involve oven curing or UV curing.
The appearance after curing is what matters.
Fresh ink can behave differently from a fully cured and coated sheet.
That is why press teams should not judge an important colour halfway through the production process and assume nothing will move afterwards.
The relevant question is not:
“What did the ink look like when it was fresh?”
It is:
“What does the finished printed and coated sheet look like?”
That is the surface the customer is buying.
Gloss and Matte Can Make the Same Colour Feel Different
Two samples can be technically close yet look noticeably different when placed side by side.
Surface finish is often the reason.
Gloss varnish creates stronger reflections.
A glossy colour may appear:
- Deeper
- Richer
- More saturated
- Higher in contrast
Matte varnish reduces glare and changes the way the eye reads the same artwork.
The colour may feel:
- Softer
- Flatter
- More muted
- Slightly lighter
The ink formula may not have changed at all.
The finish has changed the visual experience.
That is why colour and varnish should be approved together.
Approving a glossy sample and then switching mass production to matte is not a harmless finishing change when brand colour matters.
Lighting Can Start an Argument Between Two Correct People
A sample looks right beside the press.
The buyer takes it into an office with cool LED lighting and sees a different blue.
Another colleague carries it next to a window and sees something else again.
Now three people are looking at the same piece of metal and describing three slightly different colours.
Lighting genuinely affects visual colour perception.
Metamerism can also cause two colours to appear close under one light source but separate under another.
Not every biscuit tin or promotional box needs laboratory-level colour control.
A signature corporate colour may.
For sensitive projects, agree how the colour will be viewed.
Otherwise one person approves the sample under daylight while another rejects production under a warm desk lamp.
Neither person necessarily has poor eyesight.
They are simply evaluating the package under different conditions.
A Screenshot Helps With Design — Not Production Approval
Another familiar message arrives:
“Please make the tin exactly this blue.”
Attached is a screenshot.
The image helps.
It tells us whether the customer wants navy, cobalt, turquoise or something in between.
It cannot reliably define a production colour.
Different devices have different:
- Brightness settings
- White points
- Display profiles
- Panel technologies
- Viewing modes
A screen also emits light.
A printed tin reflects it.
Those are fundamentally different ways of creating colour.
We use a simple distinction:
A screenshot is useful for design direction. A physical reference is used for colour approval.
If the buyer may reject 20,000 tins because a corporate blue is wrong, a phone image is not a strong enough standard.
Forming Changes the Surface, Not the Ink Formula
Tinplate is normally printed flat.
The sheet then moves through forming.
Depending on the structure, that can involve:
- Stamping
- Drawing
- Bending
- Curling
- Seaming
- Embossing
The ink does not suddenly become another Pantone shade because the metal has been formed.
The angle of the surface changes.
A flat panel reflects light differently from a curved wall.
A rounded corner catches light differently from a flat lid.
An embossed logo creates highlights and shadows that were not visible on the original sheet.
Metallic designs make these differences especially easy to see.
A flat printed sheet is useful for controlling colour.
A formed tin is still worth checking when shelf appearance matters.
How Much Colour Difference Is Acceptable?
Colour discussions often stall at this point.
The buyer says:
“It looks different.”
The printer replies:
“It is within tolerance.”
Neither statement helps if nobody defined the rules before production.
Three questions need answers.
What Is the Master Reference?
Choose the priority standard.
It may be:
- A Pantone guide
- An approved printed metal proof
- A previous production tin
- A physical brand master
- A signed press sample
If several references exist and they do not match perfectly, decide which one takes priority.
“Match all of them” is not a workable specification if the references already disagree with each other.
Will Approval Be Visual or Measured?
Many custom tin projects are approved visually.
That can work perfectly well.
More tightly controlled programmes may use a spectrophotometer together with an agreed colour-difference tolerance such as Delta E.
The important part is not choosing the smallest possible number.
It is choosing a tolerance that makes sense for the actual colour, substrate, printing method and brand requirement.
A flat solid colour over white may justify tighter control than a deliberately metallic area whose appearance changes with viewing angle.
Agree the tolerance before production.
Do not invent the acceptance rule after the tins arrive.
Under What Lighting?
Visual approval only works when both sides have some understanding of the viewing condition.
Routine decorative tins may not require formal controlled lighting.
Critical corporate colours deserve more care.
If the buyer and printer are judging under completely different light sources, unnecessary disputes become much more likely.
A Practical Colour Approval Workflow for Custom Tin Boxes
A good approval process removes ambiguity before the main press run.
Here is the sequence we prefer.
Step 1: Provide the Best Colour Reference Available
Send the Pantone number.
If you have a physical brand master or previous approved pack, send that as well.
Screenshots can support the discussion but should not replace the physical reference.
Step 2: Confirm What Sits Under the Colour
Specify whether the ink will print over:
- Opaque white
- Exposed silver tinplate
- Another printed colour
This decision can change the finished appearance dramatically.
Step 3: Confirm Spot Colour or CMYK
Do not assume.
If one colour is particularly important to the brand, tell the printer.
Step 4: Review Colour Sequence Where Overprinting Matters
If the appearance depends on several inks overlapping, the planned production sequence should be considered during sample approval.
Step 5: Confirm the Finish
Gloss, matte, localised UV and metallic effects belong in the same discussion as colour.
Step 6: Check the Ink Match
Use a drawdown or controlled ink test to confirm that the formulation is moving in the right direction.
Step 7: Check the Press Result
Review an actual printed metal sheet or physical sample produced under conditions close to mass production.
Step 8: Approve a Physical Master
Keep the approved sample.
For a repeat order six months later, that physical reference is usually far more useful than trying to recreate the entire colour discussion from memory.
Before Approving Your Tin Colour
Buyers who do not want to work through every press variable can use this shorter checklist.
Confirm:
- Pantone or other colour reference
- Physical brand master, if available
- White base or exposed tinplate
- Spot colour or CMYK
- Metallic effect requirements
- Colour sequence where overprinting matters
- Gloss, matte or other finish
- Physical printed sample
- Viewing condition for critical colours
- Agreed production master
- Colour tolerance where required
- Person responsible for final approval
Most colour disputes become much easier to avoid once these points are settled before mass production.
A Colour-Matching Mistake We See More Often Than You Might Expect
Imagine a tea brand built around a deep metallic blue.
The designer supplies a Pantone reference.
The artwork also asks us to retain some silver reflection from the tinplate underneath.
The ink-room drawdown looks good.
The press sample looks good.
The metallic effect is exactly what the design team originally requested.
Then someone at head office opens the Pantone paper guide, places it beside the formed tin and asks:
“Why doesn’t this blue match?”
The problem may not be the ink.
The project never defined what “match” meant.
Was the target:
- The paper appearance of the Pantone swatch?
- A metallic interpretation based on that Pantone colour?
- A previous brand pack?
- The approved metal press sample?
Until one of those becomes the master reference, adjusting the ink again may simply move the disagreement somewhere else.
Pantone Matching Is a Process, Not a Number
A Pantone code remains one of the best tools we have for communicating colour across designers, buyers and printers.
It simply cannot carry the entire production specification on its own.
With custom tin box printing, the final result comes from a chain:
Colour target → substrate → base coat → ink formulation → colour sequence → press conditions → curing → finish → forming → viewing light
Change one link and the final appearance can move.
That does not make metal printing unpredictable.
It makes process control important.
The best projects replace vague comments such as:
“The colour feels a little off.”
with a clearer production language:
“This is our approved metal reference, printing structure and acceptance standard.”
Once both sides are working towards the same physical result, colour discussions become much easier.
Final Thoughts
If a finished tin looks different from a Pantone paper sample, do not immediately assume somebody mixed the wrong ink.
Start with the production structure.
Ask:
- Was the colour printed over white or exposed tinplate?
- Was it a dedicated spot ink or a CMYK build?
- Did other colours overprint it?
- Was the colour sequence the same as the approved sample?
- Was the press running under stable conditions?
- Was the sheet fully cured?
- Was the correct varnish applied?
- Are both parties viewing it under comparable lighting?
For ordinary artwork, a Pantone reference and a competent physical sample may provide all the control the project needs.
A signature corporate colour deserves more attention.
An extra press check costs far less than arguing about colour after thousands of tins have already been formed, packed and loaded into cartons.
For critical brand colours, approve the process — not just the Pantone number.
Need Help Matching Your Brand Colour on Tinplate?
Send Itinbox your artwork, Pantone reference and preferred finish.
We can review the colour together with the actual printing structure, including the white base, exposed-metal areas, spot colours, CMYK requirements, colour sequence and finishing method, before mass production begins.
The goal is not to promise that reflective tinplate will behave exactly like a Pantone swatch printed on paper.
The goal is to establish a realistic colour target and make sure the buyer, ink room and press team are all working towards the same approved result.
Most fully customised Itinbox tin packaging projects start at a standard MOQ of 5,000 pieces.
Website: https://tinpackpro.co.uk/
Frequently Asked Questions
Why does a Pantone colour look different on tinplate?
Tinplate reflects light differently from paper. The base coat, ink opacity, printing sequence, varnish and viewing light can all influence the finished appearance.
Can a Pantone colour be matched exactly on a tin box?
A Pantone reference provides a clear target, but a finished metal surface should not automatically be expected to look identical to a paper swatch. Critical colours are better approved on an actual printed metal sample.
Does colour sequence affect tin box printing?
Yes, particularly where colours overlap. Printing order can influence trapping, overprint density and the appearance of combined colours. The correct sequence depends on the press, ink system and artwork.
What is a colour drawdown?
A drawdown is a controlled test of an ink formulation before full production. It helps evaluate the basic hue, strength and opacity of a spot colour.
Why can a drawdown match while the press sample looks different?
A production press introduces additional variables such as ink-film thickness, dampening, ink/water balance, trapping, curing and varnish. A laboratory match is therefore only the starting point.
Does a white base make Pantone colours more accurate on tinplate?
A white base reduces the visual influence of the silver metal and often produces a more solid, conventional appearance. It can be useful when brand consistency matters more than metallic reflection.
Can higher opacity solve a colour mismatch?
Sometimes, but not automatically. The correct solution may involve the white base, ink formulation, ink-film strength or artwork separation. The desired final appearance should be defined first.
Is CMYK the same as a Pantone spot colour?
No. CMYK builds colour from process inks, while a spot colour is mixed and printed separately. The two methods should not automatically be expected to look identical.
Can matte or gloss varnish change the colour?
They can change how the colour is perceived. Gloss usually increases reflection and contrast, while matte creates a softer visual effect.
Why does the same tin look different under LED light and daylight?
Different light sources change colour perception. Some colours may also exhibit metamerism, appearing close under one light source but less similar under another.
Can I approve tin colour from a PDF or phone screen?
A digital proof is useful for artwork and general colour direction, but it should not be the sole production standard for a critical brand colour.
What is Delta E in packaging colour control?
Delta E expresses colour difference numerically. It can be useful for production QC, but the acceptable tolerance should be agreed for the specific substrate, colour and project rather than applying one universal limit.
What should be used as the master reference for repeat orders?
For colour-sensitive projects, an approved printed metal sample or another agreed physical production standard is usually the most useful reference for future batches.
