Artwork & File Setup Guide for Custom Printing Orders

The Artwork & File Setup Guide for Custom Print Orders

Most production delays on custom printing orders are not caused by capacity, materials or shipping. They are caused by the file. A layout that looks finished on a designer’s screen can arrive at a factory missing the few technical properties that make it printable, and the result is a round of back-and-forth that costs days.

This guide covers what a production-ready file actually contains, written from the side of the desk where files are opened, checked and sent to press. None of it requires design training. It requires knowing which properties matter and checking them before you send.

If you want to see how artwork feeds into the rest of an order, the custom printing range shows what the files are ultimately used on, and how to order sets out the sequence from enquiry to delivery.

What “Print-Ready” Really Means

Print-ready is not a compliment about how a file looks. It is a technical statement with four parts.

The file must be at the right dimensions, at the right resolution or as vector. It must carry the additional artwork needed for cutting and finishing. It must not depend on anything installed only on your computer. And its colour must be defined in a way the press can reproduce.

A file that satisfies those four properties will go to production without a single question. A file that fails any of them will trigger one. Everything below maps onto one of these four.

Vector Versus Raster: The Decision That Sets Everything Else

The first thing to establish is whether your artwork is vector or raster, because it determines what is possible.

Vector artwork is described mathematically, as paths and shapes. It has no fixed resolution, so it can be scaled from a business card to a large format item without any loss of quality. Logos, lettering, diagrams, simple illustrations and any flat graphic are naturally vector. Common formats are AI, EPS, PDF and SVG.

Raster artwork is a grid of pixels. It has a fixed resolution, and enlarging it does not add detail — it simply makes the existing pixels bigger, which is what produces visible softness and stepped edges. Photographs and any artwork with continuous tonal gradation are naturally raster. Common formats are JPG, PNG and TIFF.

The practical rule is straightforward: send vector when the design allows it, and send raster only when the content genuinely requires it. When you must send raster, send it at a resolution high enough for its final size, and at the final dimensions rather than scaled down.

One consequence is worth internalising early. A logo that exists only as a small raster image cannot be enlarged for a large format print. If that is all you have, the logo needs to be redrawn as vector before a large version can exist at all. Finding this out at the quotation stage is cheap; finding it out after approval is not.

Resolution and Final Print Size

When working with raster content, resolution is only meaningful in relation to print size. A file’s pixel dimensions tell you nothing on their own.

The useful measure is pixels per unit of length at the size you intend to print. A file that is sharp at a small finished size may be unusable at a large one, because spreading the same pixels over a larger area reduces the density.

The concept behind the resolution figures you will hear quoted is that at normal viewing distance, a sufficiently high pixel density stops being perceptible to the human eye. Below that threshold, an attentive viewer can start to see individual pixel edges, particularly along curved edges and thin diagonal lines.

Two practical consequences follow. First, when supplying raster artwork, supply it at the dimensions you intend to print, or larger. Second, the further the viewing distance, the lower the required density — which is why large display items viewed from across a room tolerate files that would be unacceptable on a card held in the hand.

Colour: CMYK, RGB and Spot Inks

Colour is the most common source of disappointment, and almost all of it comes from one mismatch.

Screens emit light and can reproduce a wide range of saturated colour. Printing reflects light off ink and pigment, and covers a narrower range. Some colours that exist on a screen simply cannot be reproduced in ink. This is not a failing of any particular press; it is a property of the medium.

CMYK describes colour as combinations of four inks and is the standard model for full-colour printing. It is flexible and produces the vast majority of printed work. RGB describes colour as combinations of light and is the right model for anything that will be displayed on a screen. Submitting RGB artwork for print means the colour values will be translated, and the translation will not always land where you expect.

The practical steps are to set up your artwork in CMYK from the start, and to expect that a very saturated colour — a bright orange, a vivid green, a strong purple — will look somewhat flatter in print than on screen. If you want a specific colour to appear on more than one material, specify it as a spot colour rather than as a CMYK or RGB value. A spot colour reference defines the colour independently of how it will be produced, which is why it is the correct tool when the same brand colour has to survive across paper, fabric and metal.

Proofing on screen is a check of layout and text, not of colour. Do not approve colour from a monitor.

Fonts and Outlining

Text in a file typically references a font that is installed on the machine where the file was made. Send that file to someone who does not have the font, and the software will substitute something else — silently.

The visible result is a layout that has shifted. Words become longer or shorter, lines wrap differently, and a heading that fitted neatly across the design may now overflow or leave a gap. Because the substitution happens quietly, the first time anyone notices is often on a printed sample.

Outlining — also called converting text to curves or creating outlines — solves this by replacing the font reference with drawn paths. The text still looks identical, but it no longer needs anything installed to render correctly. Once outlined, the text is no longer editable as text, which is fine for a final production file and the reason outlined files are usually kept separate from working files.

If you need to make a text change after outlining, retype it in the working file and outline again. Keep the working version; send the outlined version.

Bleed, Trim and Safe Area

Three terms describe how artwork relates to the physical edge of the finished piece, and getting them right is what prevents white slivers and clipped text.

The trim line is where the piece will be cut. The bleed is artwork that extends beyond the trim line, so that when the cut lands slightly off — and it always lands slightly off — there is still ink underneath rather than bare material. Standard practice is to extend background elements a few millimetres past the trim line on every side.

The safe area is the zone just inside the trim line where text and logos should live. Anything placed between the safe area boundary and the trim line is at risk of being trimmed away or coming uncomfortably close to the edge. As a working rule, keep important content comfortably inside the trim line rather than relying on the cut being exact.

Backgrounds, borders and any colour that should reach the edge must extend into the bleed. Text and logos must stay inside the safe area. These two rules prevent the great majority of edge-related production queries.

Minimum Line Weight and Small Detail

Thin lines and small text behave differently in print than on screen, and there is a physical floor below which detail stops reproducing reliably.

Very fine lines can break up or disappear, particularly when they sit on a contrasting background or run at an angle to the direction of printing. The same applies to very small type, and to fine detail inside a logo mark. Negative spaces — small gaps inside a shape — close up more readily than the shapes around them.

The practical guidance is to avoid hairline strokes in production artwork, to keep very small text out of reversed or low-contrast treatments, and to give detail elements enough weight to survive the process. When a design genuinely depends on extremely fine detail, the honest answer is that the detail will need to be adjusted for the substrate rather than the substrate chosen to suit the detail.

Note also that substrates differ. A smooth coated paper holds detail far better than a textured or woven material. The same artwork that is crisp on a card may lose its finest elements on a fabric or a moulded surface.

Checking Your File Before You Send It

A short checklist covers almost everything that goes wrong. Run through it every time.

Check	What good looks like
Format	Vector for logos and flat graphics; high resolution raster only for photographs
Resolution	Raster content at final print size, dense enough for how it will be viewed
Colour mode	CMYK for print; spot colours named where an exact brand colour matters
Fonts	All text outlined, or fonts supplied alongside the file
Dimensions	Artwork at final finished size, not scaled
Bleed	Background extends beyond the trim line on all sides
Safe area	Text and logos kept well inside the trim line
Line weights	No hairlines; small detail heavy enough to reproduce
Layers	Flattened or clearly organised, with no hidden elements carrying stray marks
Versions	One clearly named final file, not a folder of candidates

The last item on that list causes more problems than its position suggests. Sending three files named with dates, in a folder with other attachments, invites the wrong one being used. Send one final file and name it unambiguously.

What to Send With the File

Artwork alone rarely answers every production question. Include the surrounding information with the file so the order can be quoted and prepared without a second exchange.

State the finished size and the quantity, and note which side carries which artwork. Say whether the item is single sided or double sided. Identify any colour that must be matched exactly. Mention any finishing that interacts with the artwork — a foil stamp, an embossed area, a die cut shape, a variable data field — because these constrain where artwork can sit. If the order will be produced in more than one language or version, say so, and label each file accordingly.

Getting It Right the First Time

Artwork problems are the most avoidable cost in custom printing. They add a proof cycle, they delay production, and they sometimes force a redesign that nobody budgeted for. Every one of them is caught by checking a handful of properties before the file leaves your computer.

The natural next step, once your file is right, is the production schedule. Our guide to custom printing lead times covers how artwork readiness, proofing and production stages stack up in a real order.

If you would rather have the file checked by the people who will print it, our team reviews artwork as part of the quoting process and will tell you plainly what needs adjusting. You can Get a Quote and send your artwork with the intended size, quantity and finishing; the production steps this feeds into are set out on our how to order page. You can also reach the team at sales@yichico.com or on WhatsApp +86 13585719693.