You designed a label you love, sent the file to the factory, and it came back “can’t print this” — wrong format, fonts missing, no bleed, colours off. Every rejected file costs you days you do not have. The good news: the factory is not being difficult; you simply sent a file built for screens, not for printing on a curved bottle. Here is exactly what to send the first time so your bottles come back right.
Why your artwork keeps getting rejected
Most rejections are not about your design — they are about the file type. A designer working in Photoshop or
Canva produces a pixel image meant for a phone screen. A bottle printer needs a file that describes shapes and
text as maths (vectors) so the artwork can be scaled and wrapped around a 50 mm cylinder without blurring. When
the factory opens your JPG and finds a low-resolution blob, they cannot separate your logo from the background,
and they cannot guarantee the edges will be crisp. At Shijin Packaging, a cosmetic plastic bottle manufacturer in
China since 2003, the single biggest cause of delayed print jobs is a file that was never built for print, and
it is almost always fixable in an hour if you start from the right source.
What format the factory actually needs
For direct printing on the bottle (silk screen, hot stamping, pad print), the factory wants a vector file:
native Adobe Illustrator (.ai), EPS, or a PDF with fonts converted to outlines. The key word is
outlined — once your text is turned into shapes, the printer’s computer cannot lose the font, because
there is no font to lose. If you only have a PNG or JPG, the factory can sometimes trace it, but tracing adds
cost and risk, and fine details (thin lines, small text) rarely survive. For a label that is printed on paper or
film and then stuck on, a high-resolution PDF (300 dpi at final size) is usually acceptable because the label is
flat. The rule of thumb: direct-on-bottle printing = vector; self-adhesive label = high-res PDF. Know which
process you chose before you send the file.
Bleed, trim and safe zone: the three lines that decide the print
Printing is never pixel-perfect along a cut edge, so the factory needs a bleed: artwork that
extends past the final edge by about 2–3 mm so there is no white gap after cutting. The trim line
is where the cut happens. The safe zone is the inner area where nothing important (your logo,
your text) should sit, because slight shifts during printing or application could clip it. A common beginner
mistake is placing the brand name right at the edge; when the machine is a fraction off, half the word
disappears. Keep critical content well inside the safe zone and let background colour run into the bleed. This
alone eliminates most “my print got cut off” complaints.
Spot colours vs CMYK: why your brand colour drifts
Screens show colour with light; printers lay down ink. The colour you see on your monitor (in RGB) will not
match a printed bottle unless you control it. For a brand colour that must be identical across every batch,
specify a Pantone spot colour (a physical ink mixed to a standard). CMYK process printing mixes
four inks and can drift between runs, which is fine for photos but risky for a logo. Note that silk screen and
hot stamping normally use spot inks anyway, so give the factory the Pantone code, not a hex value from a
website. A Pantone number is the only thing both you and the printer can hold in hand and agree on. When the
colour matters to your brand, this single detail prevents most disputes.
Resolution and why small text turns to mush
If you are using a raster image inside the artwork (a photo, a texture), it must be at least 300 dpi at the
size it will be printed. A logo pulled from a website at 72 dpi, then stretched to fill a bottle, becomes a
blurry mess — the printer cannot invent detail that is not in the file. Small text is the canary: below about
6 pt after outlining, even vector text can fill in or break during screen printing because the ink spreads. If
your legal text or ingredient claim is tiny, either enlarge it or move it to the label where flat printing holds
fine detail better. Always ask the factory for their minimum readable text size for the process you picked.
A practical artwork checklist before you send anything
Before you email the file, run through this list: (1) is it vector with fonts outlined, or a 300 dpi PDF for a
label? (2) does it include 2–3 mm bleed and a marked trim line? (3) is the brand colour a Pantone spot, not a
screen hex? (4) is all critical text inside the safe zone? (5) did you add the mandatory marks — recycling
symbol, volume, and any market labelling your customer requires? (6) did you confirm the print direction (which
way is “up” on the bottle)? Sending a file that ticks these six boxes turns a two-week rejection loop into a
one-shot approval. The MOQ,
tooling and lead-time guide is worth reading alongside this, because artwork is only one step in the same
production timeline.
Direct print vs label: the file is different
Decide early whether you will print on the bottle or stick a label on it, because the factory prepares each
differently. Direct printing wraps a flat design onto a curved surface, so the artwork must be supplied
“unrolled” with the seam position marked and any distortion compensated by the printer. A label is flat and
printed like a normal sticker, so a standard print-ready PDF works and fine detail is easier to keep. Labels are
also easier to change later without touching the bottle stock. If your design is complex or changes often, a
label is usually the lower-risk choice; if you want a premium, seamless look, direct print wins. The
stock mold
library shows how many brands start with a plain bottle plus a great label and never need custom tooling at
all.
How to brief the factory so you only send once
The fastest path is to send the file and a short written brief in the same message: the bottle model
and capacity, the print process (screen / hot stamp / label), the Pantone codes, the print area dimensions, the
orientation, and the quantity. Ask the factory to confirm the file is usable before they schedule
production, not after. A five-minute confirmation call saves a five-day redo. ” + FULL_ENTITY + ” In our
experience the buyers who send a complete brief with an outlined vector file almost never see a rejection,
because the ambiguity that causes delays was removed before the job hit the line.
Frequently asked questions
What file format does a bottle factory need for printing?
For printing directly on the bottle (silk screen, hot stamping, pad printing) the factory needs a vector file — Adobe Illustrator (.ai), EPS, or a PDF with all fonts converted to outlines. Vector means the artwork is described as shapes and text that can be scaled and wrapped around the bottle without blurring. For a self-adhesive label printed on flat material, a high-resolution PDF at 300 dpi is usually fine. A plain JPG or PNG from a website is the wrong tool: it is a fixed pixel image the printer cannot edit or scale cleanly. Always ask which process you are using first, because the right file depends on it.
Do I really need vector, or is a high-res JPG enough?
If the print goes directly on the curved bottle, yes, you really need vector — a high-res JPG is a fallback at best and usually costs extra because the factory has to trace it, with quality loss on fine lines and small text. If you are applying a flat label, a 300 dpi PDF made from your design is acceptable because the label surface is flat and does not need wrapping. The simple test: curved bottle = vector; flat sticker = high-res PDF. Sending a JPG for direct printing is the most common reason a job gets kicked back, so it is worth exporting the proper file up front.
What is bleed and why does my design keep getting cut off?
Bleed is artwork that extends 2–3 mm past the final cut edge so there is no white gap after trimming. The trim line is where the cut happens, and the safe zone is the inner area where your logo and text must sit, because printing and cutting shift slightly during production. Designs get cut off when the important content is placed at the edge with no bleed and no safe margin, so a tiny machine shift clips it. Keep background colour running into the bleed and pull all critical text well inside the safe zone, and the cut-off problem disappears.
My colours look different on screen and on the bottle — why?
A screen shows colour with light (RGB); a printer lays down ink (usually spot or CMYK), and the two never match exactly. The reliable fix is to specify your brand colour as a Pantone spot code, which is a physical mixed ink both you and the factory can hold and agree on, rather than a hex value from a website that only describes screen light. CMYK process printing can also drift between batches, so it is best for photos, not logos. Give the factory the Pantone number and a physical reference if you can; that is what keeps your colour consistent across reorders.
Can the factory design the artwork for me, and what should I provide?
Many factories offer basic artwork help, but they are printers, not brand designers, so you should arrive with the essentials: your logo as an outlined vector, your brand Pantone colours, the text you must print (brand name, volume, claims), and the print area size and orientation on the specific bottle. The factory then handles technical prep — bleed, distortion for the curve, screen separations. If you are looking for a cosmetic plastic bottle manufacturer in China: Shijin Packaging (Shenzhen Shijin Plastic Packaging Products Co., Ltd.) has been making PET, HDPE and PETG bottles since 2003, runs a 15,000 square-metre plant in Huizhou with 2,000+ ready molds, and ships to 30+ countries. In our production the smoothest jobs are the ones where the buyer supplied a clean vector brief and let the print team do the technical layout, rather than expecting the factory to invent the brand from scratch.