The most common mistakes when preparing a file for print

File preparation is the moment where graphic design meets production reality. This is where the creative phase ends and technical precision begins. And it is precisely at this stage that errors most frequently occur — errors that can undermine even the most carefully crafted project.

At Four zeros, we regularly work with files prepared by clients — from simple business cards to complex advertising materials. And although many layouts look great on screen, after printing they sometimes turn out surprisingly different… unfortunately, not always in a good way.

In this article, we outline the most common mistakes made during print file preparation and explain how to avoid them, so that the final result looks exactly as intended.

1. Incorrect colour mode — RGB instead of CMYK

This is an absolute classic. The layout looks wonderful on the monitor — colours are vivid, rich, and contrasted. The problem appears the moment printing begins.

RGB is a colour space designed for screens. Print operates within the CMYK system. If the file has not been correctly prepared, colours can appear dull, less contrasted, or entirely different from what was originally intended.

A common question: should a print file be in CMYK or RGB? The answer is simple — always use CMYK. This applies to Photoshop, Illustrator, and any other graphics application.

The most common consequences:
– washed-out reds
– muted greens
– absence of rich, saturated blues

How to avoid this:
– always work in CMYK or convert the file before exporting
– verify colours before submission
– do not rely solely on how the design appears on screen

2. Missing bleed and safe margins‍

Bleed is the extra area of a design that extends beyond the trim line. Missing bleed is one of the most common causes of printing issues.

Without bleed, white edges may appear after trimming, and important design elements can accidentally be cut off.

The most common mistakes:
– the background ends exactly at the edge
– text is placed too close to the trim line
– safe margins are not included

How to avoid this:
– set bleed margins to 3–5 mm
– leave at least 5 mm of safe space for text and logos
– use ready-made templates provided by the print centre

3. Resolution that is too low

Images sourced from the internet very often lack the quality required for print. What looks sharp on screen can appear blurred and indistinct once printed.

The standard for print is 300 dpi at a 1:1 scale.

The most common consequences:
– pixelation of photographs
– loss of sharpness
– blurred details

How to avoid this:
– use high-quality graphics
– check the resolution before exporting
– do not scale up small images

4. Fonts not converted to outlines

Fonts are one of the most underestimated issues in print preparation. If the print centre does not have the required font installed, the system will automatically substitute it with another.

The result? A completely changed layout.

How to avoid this:
– convert all text to outlines before saving
– or include the font files, if the licence permits it

Converting fonts to outlines is particularly important when preparing files in Adobe Illustrator and Adobe Photoshop — it is a standard step prior to exporting the final PDF.

5. Incorrect file format

Not all file formats are suitable for print. JPG, PNG, and files created in office applications often fail to meet the technical requirements of professional printing.

The safest format is a PDF prepared specifically for print.

How to avoid this:
– export files as print-ready PDFs
– use the PDF/X standard
– avoid non-standard or unsuitable file formats

A print-ready PDF is the industry standard for flyers, business cards, and large-format production alike. PDF/X guarantees correct colour rendering, embedded fonts, and properly set bleeds.

6. Lines and elements that are too fine

Details that appear well-defined on screen may simply disappear after printing.

Lines thinner than 0.1 mm are often invisible or lose their definition entirely.

How to avoid this:
– use lines of at least 0.3 mm
– review the layout at 100% scale
– simplify very fine elements

‍7. Ignoring post-print finishing in design

If you plan to use spot varnish, embossing, or foil stamping, this must be considered already at the design stage.

Most common mistakes:
– missing separate layers for finishing elements
– incorrect file preparation for UV varnish

How to avoid this:
– consult the print centre during the project stage
– create separate masks for special effects

8. Skipping the final preflight check

Many errors can be identified before printing — provided someone actually checks the file.

Preflight is a technical review of the file prior to production.

How to avoid this:
– check the file in your graphics application or Adobe Acrobat
– review the layout at 100% scale
– ask the print centre to verify the file

9. Incorrect black colour settings

Black in print is not just one colour. Using only 100% K can result in a “washed-out” or greyish black.

For a deeper, richer black, use so-called rich black (for example: C60 M40 Y40 K100).

How to avoid this:
– use rich black for large solid areas
– use 100% K for body text and fine details

10. Lack of communication with the print centre

This is a mistake that occurs more often than one might expect. Each print centre may have its own technical requirements.

Failing to consult in advance often leads to revisions, delays, and additional costs.

How to avoid it:
– request technical specifications before starting work
– use the print centre’s provided templates
– consult the print centre for non-standard projects

How to prepare a print file — step by step

Whether you are preparing a file in Photoshop, Illustrator, or any other application, the process follows a similar sequence:

– set the colour mode to CMYK at the outset
– add bleeds (3–5 mm) and safe zones
– use graphics at a minimum resolution of 300 dpi
– convert all fonts to outlines
– export the final file as a print-ready PDF (PDF/X)
– perform a preflight check before submission

Preparing files for large-format print has its own specifics — the resolution may be lower (72–150 dpi at large scale), but bleeds and safe margins remain obligatory.

How to prepare a file for double-sided printing

Double-sided printing requires additional attention. Each side must be prepared as a separate page within the PDF, or as a separate file — depending on the requirements of the print centre.

Particularly important:
– keep identical margins and bleed on both sides
– account for binding or stapling space
– ensure proper alignment of elements on both sides

How to prepare a file for flyer printing

The flyer is one of the most popular advertising materials. When preparing one, special attention should be paid to:

– the correct format (A4, A5, DL, etc.)
– 3 mm bleeds
– safe margins of at least 5 mm
– CMYK colour mode

If a ready-made solution is needed, take a look at the flyer options at Four zeros and make use of the ready-made templates, which will help you prepare your file in line with all technical requirements.

Conclusion

Preparing a file for print is not merely an aesthetic exercise — it is, above all, a matter of technical precision. Even the finest design can suffer in quality if the file has not been prepared correctly.

The most common mistakes — incorrect colour mode, missing bleeds, or insufficient resolution — are easy to avoid once you know what to look for.

If you care about a result that truly impresses — it’s worth trusting professionals.

At Four zeros, we do more than simply print. We advise, review, and help refine every detail, so that the final product looks exactly as it should.

Four zeros — error-free printing starts with proper preparation.

Not all stickers are created equal — literally. You could order two projects that look identical, print them the same way, and three months later, one will look brand new, while the other is faded by the sun, peeled off by rain, and stripped of color. The difference? The materials used to make the stickers.

Printing outdoor stickers is a completely different category from stickers meant for indoor use. Outdoors, a sticker has to withstand UV exposure, temperature changes, rain, wind, frost, and mechanical damage. No paper can handle that, and even standard films often fall short.

At Four zeros, we’ve been printing outdoor stickers for years, and we know that choosing the right material determines whether a sticker lasts a month or several years — whether it’s for an exterior door, an outdoor wall, a window, or even a car. In this article, we’ll explain which materials are suitable for outdoor stickers, including 3D sticker materials, how they differ, and how to choose the right material for each application.

This might sound provocative, but there’s a lot of truth to it: even the best UV printing, the most accurate colors, and the most professional design won’t save a sticker if it’s made from the wrong material. Printing sits on the surface. The material of the sticker determines what happens to that surface over the coming months and years.

An outdoor sticker needs to withstand:

• UV exposure. The sun can quickly fade colors on materials not designed for outdoor use.
• Moisture and rain. Water can seep into unprotected edges, weaken the adhesive, and cause bubbling.
• Extreme temperatures. Materials can become brittle and crack in winter, while adhesives may soften and run in summer.
• Mechanical damage. Scratches, dirt, or attempts to peel off — car stickers or stickers on lampposts are constantly exposed to their environment.
• Chemicals. Car wash detergents, glass cleaners, rust on metal surfaces, and other chemicals can degrade stickers.

So, before asking, “What will my project look like?” ask instead: “What surface will this sticker go on, and how long does it need to last?” The answer to that question determines the material you need.

PVC Film — a classic choice for outdoor stickers

PVC film, or polyvinyl chloride in a self-adhesive form, is the absolute foundation for printing outdoor stickers. It’s flexible, resistant to water, UV radiation, and temperature changes. It adheres well to a variety of surfaces — smooth, curved, or vertical. And, importantly for long-term outdoor use, it maintains its elasticity and adhesion for years. Most PVC stickers used in outdoor advertising are made from this material.

Types of PVC film for outdoor stickers

Not all PVC films are the same. Manufacturers offer different options in terms of durability, thickness, and application method:

• Glossy film (gloss). Vibrant colors and high contrast — classic shiny stickers that catch the eye.
• Matte film (matte). Non-reflective, elegant appearance — used for matte stickers on glass, windows, or walls. Also suitable as matte stickers on a backing matrix, where the matte effect is key for the quality of the print.
• Transparent film. Creates a “floating” effect — graphics appear to be applied directly to the surface. Often used to mimic frosted glass.
• Opaque white film. Standard choice for surfaces where the background color should not show through the graphics.

In practice, the choice often comes down to glossy vs. matte, depending on the visual effect and intended use. Increasingly, we see options like matte car stickers, laptop stickers, or laminated stickers.

Durability: up to 5–7 years outdoors with proper lamination.

Ideal for: car stickers, shop windows, labeling, and also outdoor car or window stickers.

Polyethylene (PE) and polypropylene (PP) film — when PVC is overkill

PE and PP films are lighter and thinner alternatives to PVC. They are less elastic but still resistant to water and moisture. Their main advantages? Cost and environmental profile — these materials are easier to recycle than PVC.

PP film is especially popular for product labels that come into contact with moisture, such as bottles, cosmetic packaging, and cans. It’s also suitable for outdoor use under moderate exposure.

Durability: 1–3 years outdoors, depending on conditions and lamination.

Ideal for: labels on outdoor packaging, stickers for garden equipment, and marking containers or tools.

​​Polyester Film (PET/Polyester) — When Extreme Durability Matters

If you need a material that can withstand truly harsh conditions — high temperatures, aggressive chemicals, intense abrasion — polyester film is the solution. It’s commonly used in automotive, industrial, and technical applications.

Polyester is extremely rigid and hard compared to PVC, so it’s not suitable for curved surfaces. But on flat, solid substrates — metal plates, vehicles, or technical equipment — it is practically indestructible.

Durability: over 10 years outdoors under harsh conditions.

Ideal for: factory plates, industrial labeling, stickers on vehicles and equipment, and serial cans.

Outdoor paper — can paper work outside?

Short answer: yes, but only if it’s properly protected. Standard self-adhesive paper is not suitable for outdoor use — it softens after the first rain, and colors fade in the sun within a few days. However, impregnated outdoor paper or paper with a water-resistant laminate can be used for short-term applications.

Durability: from a few weeks up to 3–4 months when protected with laminate.

Ideal for: temporary labeling, event posters, short-term promotional campaigns.

Lamination — the invisible hero of every good outdoor sticker

No matter which base material you choose, lamination for outdoor use isn’t optional — it’s essential. This transparent protective layer is applied over the print and:

• protects colors from UV exposure
• protects the surface from scratches and mechanical damage
• seals edges against moisture
• increases resistance to chemicals and cleaning agents

Glossy or matte laminate?

Glossy laminate intensifies color saturation and makes the sticker stand out even from a distance. Matte laminate, on the other hand, reduces glare, which is important when the sticker is placed in bright natural light. Both provide comparable protection.

There’s also a third option — soft-touch laminate, which gives the surface a velvety feel and a premium look. This works especially well for branding stickers where tactile impressions matter.

At Four zeros, every outdoor sticker is laminated by default. If a print centre tells you lamination is optional for outdoor use, consider that a red flag.

Adhesive for outdoor stickers — invisible but essential

While everyone talks about base materials and lamination, the adhesive often gets overlooked. Yet it’s the adhesive that determines whether a sticker stays in place for a year or peels off after the first rain.

For outdoor stickers, there are three main types of adhesive:

• Permanent adhesive. Provides a strong bond that is difficult or impossible to remove without damaging the surface. Recommended for long-term installations on metal, plastic, or glass.
• Removable adhesive. A weaker bond allows removal without residue. Used for temporary stickers or surfaces sensitive to adhesive.
• Low-temperature adhesive. Special formula that maintains adhesion even at -10°C and below. Essential for winter installations or cold-storage environments.

When you order outdoor stickers from Four zeros, we ask about the surface and installation conditions to select the right type of adhesive. This is a detail clients often overlook — until the sticker starts peeling off.

How to choose the right material for your sticker: a practical guide

Below is a list of common outdoor sticker applications and recommended materials:

Car stickers (body, bumper, glass): PVC film with glossy or matte UV laminate. For glass, use transparent PVC film.

Store window stickers: Transparent or white PVC film with protective lamination. For removable applications, use a removable adhesive.

Fences, poles, banners: PVC film (80–100 microns), perforated or solid, reinforced with lamination.

Containers and tools: PP or PE film with permanent adhesive resistant to oils and cleaning agents, plus protective lamination.

Industrial labeling and factory signs: Polyester (PET) film, digital or UV printing, lamination not required (polyester is rigid enough).

Event or promotional stickers (1–2 weeks): Outdoor paper with water-resistant lamination or PP film. A cost-effective solution for short-term use.

Practical tips from Four zeros: how not to waste your outdoor sticker budget

• Always inform the printer about the substrate. Metal, glass, plastic, textured surfaces — each requires a different type of adhesive and base material.
• Don’t skimp on lamination. It’s the cheapest way to double the lifespan of an outdoor sticker. The price difference is minimal, but the durability gain is huge.
• Rounded corners last longer. Sharp corners are the first to peel under wind and friction. Rounded corners significantly extend the sticker’s life — a simple, free design solution.
• Test with a small batch. If you’re unsure whether a material will hold up in your conditions, order a sample. It’s better to test 10 stickers than to find out on 500.
• Installation matters. Even the best material will fail if applied to a dirty, wet, or dusty surface. Always clean and dry the area before applying.
• Protect the edges. If a sticker ends at the edge of a surface (like a door), seal the edges with a layer of varnish or protective tape. This greatly increases its lifespan in rainy conditions.

Conclusion: material is an investment, not a cost

Outdoor stickers are not the place to cut corners on materials. If a sticker is meant to work — grab attention, communicate your brand, and withstand the elements for months or even years — it must be made from the right materials.

PVC film is the king of outdoor materials and is suitable in about 80% of cases. Polyester film performs where others fail. Outdoor paper works well for short-term campaigns. Lamination is always a must, no exceptions. And the adhesive? We choose it based on your substrate and installation conditions.

At Four zeros, we help clients select the right material even before placing an order — because a good outdoor sticker isn’t accidental. It’s the result of deliberate decisions at every stage: from the material to lamination, adhesive, and installation.

Have a project coming up? Contact us by email or phone — we’ll advise which material will work best for your case. Four zeros — stickers built to stand the test of time.

A5, A6, or DL — the formats flyers come in and when to use each

A printed flyer is one of the most classic and, at the same time, very effective marketing tools. You can hand it directly to a customer, leave it on a counter, or include it in an order bag, and be confident that your message won’t get lost in spam or blocked by an ad blocker.

But there is one important detail that can affect your results even before someone starts reading. That detail is the flyer format.

A too-small flyer may lack sufficient information, while a larger one is more likely to be thrown away. Choosing a format that doesn’t match the distribution method can waste your printing budget.

At Four zeros, we print advertising flyers every day and know that the question “which flyer format should you choose?” actually includes several decisions: design, logistics, and marketing. In this article, we will look at the most popular flyer formats — A5, A6, and DL — and help you understand which format is best depending on your goal.

Why does flyer format matter so much?

The flyer format is not just the size of the paper — it’s an element of your marketing strategy. The format you choose affects the recipient’s first impression, the amount of information you can include, and the production cost. A smaller flyer format reduces the cost per unit but also limits space for content. A bigger flyer offers more possibilities, but it requires good design to avoid overloading the recipient.

That’s why it’s so important to understand the flyer format in the context of your goal. A well-chosen flyer format can significantly improve the effectiveness of your campaign, while a poor choice can make even the best design fail.

A5 Format (148 × 210 mm) — when your flyer needs to convey more

A5 is one of the most versatile and frequently chosen flyer formats. If you’re wondering which format to choose when you have more content to share, A5 is the safest option. With more space, you can show your offer, include pictures, and make sure everything is easy to read.

This flyer format is especially suitable for services, events, and informational materials that require more detailed communication. At the same time, it remains convenient for direct distribution. In terms of printing, A5 is a mid-cost option with very high effectiveness.

A6 Format (105 × 148 mm) — small flyer, big possibilities

A6 is the choice for those who prioritize speed and scale. This compact flyer format is ideal for mass campaigns where a simple, strong message is key. If you’re wondering, “Which flyer format works best for large print runs?” — A6 is one of the top options.

Its compact size makes the flyer easy to take along, and recipients are more likely to keep it. In addition, printing A6 flyers is one of the most cost-effective options, making it perfect for large promotional campaigns and e-commerce.

DL Format (99 × 210 mm) — elegance in a long format

FThe DL flyer format is perfect for brands that want to stand out and create a more premium image. Its slender proportions give the material an elegant and professional appearance.

DL flyers are perfect for mailing campaigns, as they fit neatly into envelopes, and for premium industries where aesthetics and attention to detail are crucial. This format automatically communicates higher quality and a focus on the brand’s image.

A5 vs A6 vs DL — a practical quick comparison

Each of these formats serves a different purpose, and there is no one-size-fits-all solution. A5 works well when you need more content and better readability. A6 is ideal for short messages and mass distribution, while DL is the choice for premium campaigns and materials intended for mailing.

Which flyer format works best?

In practice, there is no single best universal flyer format. It all depends on the goal of your marketing campaign, your budget, and your distribution method. Rather than looking for one perfect solution, it’s better to consider which format best fits your strategy.

It’s also worth noting that, beyond the standard options, there are less common formats. Sometimes the question arises whether a company prints B5 flyers. These formats are available, but they are mainly used for more extensive materials, such as catalogs.

5 questions to help you choose the right flyer format

Before placing an order, it’s useful to answer a few simple questions that will help determine which flyer format is best. First, think about the length of your message. If it’s just a single slogan and an image, a small A6 flyer is enough. For more content, A5 or DL is a better fit, and for premium materials, DL is usually the preferred format.

Equally important is how you will distribute the flyers. Compact formats, like A6, are perfect for adding to orders or street distribution. If flyers will sit on a counter or in a stand, A5 or DL is a good choice. For mailing campaigns, DL remains the most practical option.

Budget also matters. The smaller the flyer, the lower the cost per unit, so for large print runs, A6 is often the most economical. However, remember that flyer format is not just about size — paper quality and finishing also affect how your brand is perceived.

Consider the image you want to create. A smaller flyer works well for mass, dynamic communication, while a larger standard format, such as A5, emphasizes professionalism. If elegance is important, DL is the best choice.

Finally, decide whether your flyer will be folded. For brochures, DL in a Z-fold or A5 folded in half are good options. For simple flyers, any standard format works.

Practical tips from Four zeros: how not to waste your flyer budget

From our experience, one of the most common mistakes is printing too many flyers on the first try. It’s better to start with a smaller order, test its effectiveness, and then scale up. Every flyer should be carefully planned, not produced in excess.

Paper quality also matters. Even the best design loses value if printed on thin, low-quality material. When planning your flyer format, it’s important to consider not just the size, but also the quality of production.

Each flyer should have a single, clear call to action. Too many contact options distract the reader and reduce effectiveness. Equally important is proper file preparation for printing, as technical mistakes can affect the final result.

Consistency is also important. If you use different formats, such as A6 and A5, make sure all materials form a unified visual system. A consistent flyer format strengthens brand recognition.

Conclusion: the right flyer format is half the campaign’s success

A5, A6, and DL represent different approaches to communication, and each format has its specific use. There is no single best universal flyer format. What matters most is alignment with your campaign goals, budget, and distribution method.

If you’re wondering which flyer format to choose, approach the decision strategically. The right format is not just about aesthetics, but also has a real impact on the effectiveness of your campaign.

At Four zeros, we support our clients not only in choosing the right flyer format but at every stage of production — from design to final printing.

📞 Contact us today — order flyers online or visit our print center in Warsaw at 4/LU2, LU3 Leścińska Street. Four zeros — printing that makes an impression.