Custom Embroidered T-Shirts: Stitch Count, Backing and Why Knitwear Punishes Bad Digitising

Embroidery on a woven shirt and embroidery on a knit T-shirt are different problems. A knit stretches, so a dense logo can pull the fabric out of shape, and a poorly digitised file can leave a puckered area around a mark that looks perfect in the design proof. The three decisions that prevent it are stitch count, backing and placement, and all three are specified before the machine runs.

Why is embroidery harder on knitwear?

Stitches fight the fabric’s stretch.

A woven fabric resists the tension of dense stitching, while a knit moves with it, so a design that works on a shirt can distort a T-shirt around the logo.

The practical consequence is that embroidery is usually better suited to a small, defined mark than to a large graphic, and that a brand wanting a large embroidered panel should expect either a heavier garment or a different method. Ask the factory which of these factors it manages and how, because the answer distinguishes a supplier that embroiders knitwear regularly from one that treats it as a variation of its woven work.

How does stitch count drive price?

More stitches mean more machine time and more thread.

Stitch count is the main unit of cost in embroidery, so a design with a large filled area costs more to produce than a fine outline of the same footprint.

Ask for the stitch count of the proposed design before it is approved, since that number explains most of the cost difference between two quotations for the same logo. Where the artwork allows, converting a heavy fill into a lighter stitch pattern or reducing the area usually lowers the cost without changing the impression of the mark. The digitising file determines the stitch count, which is why it should be treated as a specification document rather than as a production artefact: it defines the design, and it can be reused for every future order if it is retained.

Retaining the file also protects the design. Where a brand moves production or adds a second supplier, a digitised file with a known stitch count can be run again without reinterpreting the artwork, which is the embroidery equivalent of owning a pattern. Ask who holds the file and whether it will be supplied in a usable format, and treat it as part of the asset set for the style.

What makes a digitised file good?

Correct sequencing, underlay and density for the fabric.

A well-digitised file is built for the specific fabric and the specific size, with underlay that stabilises the area before the visible stitches are laid and density adjusted to the knit.

The faults that appear when digitising is poor are specific and visible: the fabric puckers around the mark, the outline shifts slightly out of alignment, or the lettering closes up at small sizes. Ask whether the factory digitises in-house and whether it will supply a digitised sample before production. Where the file is produced by a third party, the fabric and the design are optimised by two different companies, and the interface between them is where the puckering usually originates. Keeping both stages with one supplier removes a handover that is difficult to inspect.

Small text is the most common casualty. Below a certain height, letters merge because the stitch count required to render them cleanly cannot be placed in the available space, and the result reads as a smudge at arm’s length. Where a design includes small type, ask for a stitched sample of that element alone before approving the full mark, because it is the part most likely to fail and the easiest to test in isolation.

What backing suits a knit T-shirt?

The lightest backing that stabilises without stiffening.

Backing keeps the fabric stable during stitching, and the choice affects both how the mark sits and how the garment feels on the inside.

A heavy backing stabilises well and leaves a stiff panel that customers feel against the skin; a light cut-away or a fusible stabiliser is often the better compromise on a knit, provided the density of the design is also controlled. Ask what backing the factory proposes and whether it will be trimmed after stitching, because an untrimmed backing is a comfort problem that only the wearer notices. Where the mark sits against the chest, the backing is directly in contact with skin, which makes trimming part of the quality specification rather than a finishing detail.

Backing choice is also linked to the design. A dense mark requires more stabilisation than a light outline, so the two decisions should be made together rather than sequentially. Where a brand wants both a precisely stitched logo and a soft feel, reducing the stitch density is usually the more effective route than upgrading the backing, because it addresses the cause of the distortion rather than the symptom.

Where should an embroidered mark be placed?

Away from the zones that move most.

The chest, the sleeve and the neck are the usual positions, and each behaves differently depending on where the fabric stretches.

A left-chest mark is conventional and sits on a relatively stable area, while a sleeve mark moves with the arm and a neck mark is affected by the rib. Ask the factory how it positions embroidery and whether the placement has been tested on the specific fabric, because a small shift matters more on knitwear than on woven. Where a brand wants a larger mark, the upper back is usually more stable than the chest, but it also adds weight to the garment and should be tested for comfort before approval.

How should thread and colour be specified?

By matching the thread to the garment and the brand.

Thread colour affects the perception of the mark as much as the design does, and the thread type affects how the embroidery feels and ages.

Ask for the thread reference used for the sample and retain it, because a thread substitution changes the appearance in a way that is difficult to describe in an email. Where the brand has an exact colour, the match should be confirmed against a physical standard rather than a screen preview. On dark garments, a slightly lighter thread is often more legible than an exact match, which is a design decision worth testing on a sample rather than deciding from a swatch.

The thread type matters as well, since different materials reflect light differently and behave differently under the needle. A viscose thread gives a sheen that suits some identities and looks out of place in others, while a matte thread reads more subtly. Where the mark is the centrepiece of the garment, the thread finish is part of the design rather than a procurement detail.

What happens to embroidery after repeated washing?

It generally outlasts a print, with two exceptions.

Embroidery is durable because the thread is stitched through the fabric, but backing can deteriorate and dense marks can distort the surrounding knit over time.

Test the sample through repeated washing and inspect three things: whether the mark has moved relative to the garment, whether the fabric around it has stretched, and whether the backing has begun to break down. Record the results with the sample and the thread reference. Where a mark distorts after washing, the fix is usually a lower stitch density rather than a change of thread, because the problem is the tension the stitching places on the knit rather than the thread itself.

The comparison is worth making against a plain garment washed at the same time, since the knit will move slightly on its own. Without that control, a small amount of natural relaxation can be mistaken for embroidery damage, and the specification may be changed unnecessarily.

Can embroidery be combined with print?

Yes, and often better than either alone.

• A small embroidered mark with a larger printed graphic elsewhere on the garment.
• Embroidery for the brand mark and print for the campaign artwork.
• Different placements for each method, to avoid crowding one area.
• A single fabric quality that suits both methods rather than a compromise.
• A combined wash test, since each method affects the other’s performance.

Both methods place demands on the fabric, so the quality has to suit both rather than the more forgiving one.

Wash the combined sample before approving. Ask the factory to produce a sample with both decorations applied and wash it before approval, because the interaction between a print and adjacent embroidery is not predictable from testing them separately. Where both are applied by the same supplier, that test is straightforward to arrange.

Sources: Supima — extra-long staple cotton; OEKO-TEX STANDARD 100; 16 CFR Part 303 textile labelling; ISO 9001 quality management; Textile Exchange standards.