What file does an embroiderer need? Getting artwork ready for digitizing

You send your logo to an embroidery shop and they reply with a question you didn't expect: "Can you send better artwork? And we may need to simplify it." The logo prints fine on paper. Why is thread different?

Because embroidery isn't printing. Nothing is copied onto the fabric. Your logo has to be translated into a set of instructions for a needle: where to go, which stitch to use, in what order, in which thread. That translation is called digitizing, and the quality of the artwork you send decides how well it goes.

Artwork file versus stitch file

There are two different files in every embroidery job.

The artwork file is your logo: a vector or a clear image. It shows what the design should look like.

The stitch file is what the machine runs. It has an extension like .DST, .PES, .EXP or .JEF, depending on the machine brand, and it contains stitch-by-stitch commands. A digitizer creates it by hand in special software, using your artwork as the guide.

You can't convert a PNG into a good stitch file by clicking a button. Automatic conversion exists, but it doesn't understand fabric, stitch direction or thread pull, and the results usually show it.

What to send

The ideal artwork for a digitizer is:

• A vector file (AI, EPS, PDF or SVG), because the shapes and edges are exact at any size
• Or a large, clean PNG or JPG, at least 1,500 px on the long side, with sharp edges and flat colors
• Thread or brand colors, as Pantone numbers if you have them, so they can be matched to a thread chart
• The finished size in inches or millimeters
• The garment and placement: left chest on a pique polo, front of a structured cap, back of a fleece jacket

Size and fabric aren't details. A stitch file made for a 4-inch chest logo on a polo won't work if you shrink it to 2 inches or sew it on a beanie. The digitizer plans the stitches for one size and one type of fabric.

Thread has limits that ink doesn't

A needle and thread can't make marks as small as an inkjet nozzle. These are the working limits most embroiderers use.

• Text height: capital letters should be at least about 0.25 inch (6 mm) tall. Lowercase letters need more. Below that, the centers of letters like a, e and o close up.
• Line thickness: lines thinner than about 1 mm don't hold a satin stitch. They become a single running stitch, which looks like a faint sketch line, or they vanish.
• Gaps: very small spaces between shapes fill in as the thread spreads.
• Fonts: thin serifs and delicate scripts are the first things to fail. Bold, simple letterforms stitch best.

What doesn't translate well

• Gradients and shading. Thread comes in solid colors. Blends can be suggested with special techniques, but a smooth fade becomes visible bands.
• Photographs. They need a different, much more expensive approach, and rarely look like the photo.
• Drop shadows, glows and outlines-on-outlines. Each one adds stitches, bulk and blur.
• Tiny registered trademark symbols and taglines. At cap size they turn into small knots of thread.
• Distressed textures. The "worn" look is thousands of tiny gaps that thread can't reproduce.
• Very large solid fills. They use a lot of stitches, make the fabric stiff and can cause puckering.

How a logo gets simplified for embroidery

Almost every brand ends up with an embroidery version of its logo. It isn't a downgrade. It's the same mark, adjusted for the medium.

Typical changes:

1. Remove gradients and replace them with one or two solid colors
2. Thicken thin lines and strokes
3. Enlarge or remove the tagline
4. Open up small gaps and the insides of letters
5. Reduce the number of colors, since each color is a thread change
6. Drop shadows, glows and fine textures

It's much better to make these decisions yourself, in the artwork, than to let them happen by accident on the machine.

Caps are a special case

The front of a cap is curved, stiff and small. The usual maximum height is around 2 to 2.25 inches, and the center seam on many caps pulls at fine detail. Designs for caps are stitched from the center outward and from the bottom up, so they need their own stitch file. A logo that looks great on a jacket back often needs a simpler version for a cap.

Why clean artwork saves you money

Digitizers charge for their time, and many price by stitch count. When they get a small, blurry JPG, they have to guess at the shapes, and guesses become wobbly edges and uneven letters. Then come revisions, a new sew-out and more waiting.

When they get a clean vector with clear shapes and sensible line weights, the job is quicker, the first sample is usually right, and the stitch count is lower.

The short version

Send your embroiderer a clean vector or a large, sharp image, with the size, the garment and the colors. Keep text at a quarter inch or taller and lines at a millimeter or thicker. Expect to simplify gradients, shadows and tiny details. Ask for a sew-out photo before the full run.

We don't run embroidery machines, but we do prepare the artwork that makes digitizing go smoothly. If your logo only exists as a small image, or needs an embroidery-friendly version with cleaner shapes and fewer colors, start with our logo vectorization service.