What Is Puff Print? How the Raised Ink Works on a Garment

A puff print stands up from the fabric because its ink foams in the dryer. The ink contains a foaming agent that releases gas under heat. It cures into a soft, matte layer with a spongy feel. Plastisol, a PVC-based screen printing ink, is the usual base. The effect suits bold logos and lettering on cotton tees and hoodies.

Close-up of screen printing with red ink

Why puff print ink rises

Heat from the printer's dryer turns the foaming agent into gas that swells the ink. How high the print stands depends on how much additive goes into the ink and how thick a layer goes down. Additive makes up 5 to 20% of the ink's weight. More of it gives a taller print up to the 20% mark. Past that point the cured ink weakens and can flake. You choose the height and settle it on a sample print before production.

The kind of puff ink depends on your colors. A puff base gives more consistent results. It comes ready-mixed in a short range of basic colors that printers tint. Brands specify custom colors by Pantone number. The number refers to a swatch in the Pantone books that printers mix ink to match. For a Pantone color, the printer mixes additive into ink of that color and has to test the mix before production.

The rise changes the artwork

The printer lays puff down through a coarse screen. Its stencil, the hardened coating that blocks the areas meant to stay bare, is thicker than for a flat print. Ink can stay trapped in the small openings of a thick stencil, and the ink that does land spreads sideways as it rises. Lines and gaps narrower than 1 to 2 mm (1/16 in) fill in or lose their rise. Shops that publish puff design rules ask for strokes of 3 mm (1/8 in) or more and lettering at least 6 mm (1/4 in) tall. Thin script fonts are on their list of styles to avoid.

The sideways spread rounds off corners and narrows the space between letters. Wider letter spacing in the file keeps close letters from merging.

Black hoodie printed with the words I'll see you tomorrow

A large solid area pulls on the garment. The swelling layer draws the fabric under it inward until the fabric puckers or curls around the print. Ink makers suggest a coarse halftone for large areas. A halftone breaks the area into separate dots. Once risen, they give the print a bumpy surface like a basketball's. Photos and smooth gradients, built from fine dots, cannot be printed in puff. Decorators, the shops that print on ready-made blank garments, cap the size of a puff print. One sets the limit at 25 × 38 cm (10 × 15 in) and another at 36 × 41 cm (14 × 16 in). A design within 25 × 38 cm fits under either limit; a larger one needs your printer's go-ahead.

The expansion mutes color. Puff inks print lighter and duller than they look before curing. Flat colors printed over puff lighten as it expands. Because the additive shifts some colors more than others, a Pantone match is harder to reach in puff than in regular ink. Pale shades land closer to their swatches than deep ones.

White puff can serve as the underbase on a dark shirt. An underbase is the light first layer that keeps the colors above it bright.

Puff can raise one part of a design, such as the lettering, while the rest prints flat. Your designer should put the areas that rise on a separate layer of a vector file drawn at the final print size.

Where a puff print can go

Pure cotton is the safe choice for puff. At the 160 °C (320 °F) puff needs to cure, dye can leave polyester fibers and stain the ink. Printers call this dye migration. Cotton-polyester blends share the risk. If your design calls for a blend, ask the printer for a test print on the garment before production. One ink maker sells a white puff made to resist migration for that case.

Heavier fabric gives the swelling ink a stable base. One decorator recommends cotton of 6.5 oz per square yard (220 g/m²) or heavier. Lightweight and stretchy fabrics, in its experience, shift or wrinkle in the dryer and cause uneven puff or cracking. After printing, stretch pulls the foam apart as the garment is worn. One ink supplier adds a stretch additive to its puff to keep the expanded layer flexible.

Black sweatshirts on plastic hangers

Seams and zippers raise the surface under the screen and change how much ink lands. The print can skip right beside a seam. A factory that sews the garments can print the cut panels before sewing them and keep the print off the seams. Spare panels cut with the order replace misprints. Printed panels can shrink in the dryer, though. A shrunken panel no longer matches its pattern. Factories avoid the mismatch by printing on blocks, pieces of fabric cut larger than the panel, and recutting them to the exact pattern after printing.

Raised prints that resemble puff print

Several other techniques give a raised logo. Most of them have "puff" in their names. A quote for a "puff logo" can mean any of them.

Puff print High-density ink 3D puff embroidery
What raises it A foaming agent that expands in the dryer A stencil 0.2–0.4 mm (200–400 microns) thick that holds a tall layer of ink A foam shape covered with satin stitches
Edges Slightly rounded Sharp Outlined in thread
Surface Soft and spongy Very matte Satin thread
Fine detail Poor Holds well Needs wide shapes
Best on Cotton tees and hoodies Dark garments Caps and jackets

The 163 to 193 °C (325 to 380 °F) needed to cure high-density ink can scorch a white shirt. High-density ink is opaque enough that it usually needs no white layer underneath, even on dark garments. Embroiderers put 3D puff on dense, sturdy fabrics and advise against slippery or towel-like ones.

Close-up of embroidery on black cloth with a pair of scissors

Three heat-applied products are sold for small runs. You or a local shop press them onto finished garments.

Puff screen-printed transfers Puff heat transfer vinyl (HTV) "Puff" DTF transfers
What you buy Puff ink printed on transfer paper Colored film cut to the shape of the design An inkjet print on film, bonded with adhesive powder; what raises it varies by seller
Minimum order 6 sheets at one supplier, 10 per design at another None; you cut what you need None at one seller
Price $16.93 a sheet for 6 sheets or $9.14 for 12, one color, your own vector art, 29 × 36 cm (11.25 × 14 in), at one supplier From $36.79 for a 30 cm × 4.6 m (12 in × 5 yd) roll of one brand No puff price published
Wash claims None published None published; a second heat press flattens it 30+ washes, claimed by one seller

Puff DTF listings need the closest look. One kind adds a foaming ink that rises on the press. Another is a standard transfer pressed until extra adhesive melts into a thick, rubbery layer. The extra heat weakens the transfer and leads to cracking. Some listings show a flat print with drawn-in shadows that only looks raised. A sample you can touch shows which kind you are buying.

Getting a puff print made

The factory needs these on your order sheet: the garment's fiber content and fabric weight, the print's size and its distance from the collar seam, the areas that rise and the ink colors with their Pantone numbers.

Workers sewing textiles in a large garment factory

Heat and pressure after printing crush the raised foam. Ask on the care label for a cold wash with the garment turned inside out and a line dry, and add a warning against ironing the print.

A strike-off is a sample print on your actual garment. The factory prints it with the screens and ink planned for bulk. Settle height and color first. You can judge the height on a strike-off by touch and compare its color with your Pantone chip in daylight. The factory adjusts the additive or the ink and prints another until you approve the height and the color.

You can read the cause of a flat strike-off from its surface. A flat print with a glossy surface was overcured: the foam over-expanded in the heat and lost its shape. A flat print with a dull surface was undercured or printed with a thin layer of ink.

Once the height and color are approved, ask for one more strike-off made like the approved one and wash it three times by your care label. An undercured print can look right out of the dryer and crack or flake within a few washes. Kohl's inspects screen-printed garments after three home launderings and fails a print that peels or cracks or that no longer feels like the unwashed original. Your washed strike-off should pass those checks before bulk production starts.

Screens are a one-time cost that falls hardest on small orders. The screens for a two-color design add $3.33 to $4.17 per shirt to a 12-piece order.

Cost or step Figure
Screen setup $20–25 per screen, one screen per ink color
Puff surcharge 25% over a flat print at one decorator
Minimum at decorators 6 pieces at one, 50 at another
Minimum at garment factories 50–100 pieces per color and design
Decorator turnaround 7–14 business days after artwork approval
Factory sample 7 days at one hoodie factory
Factory production 4–6 weeks after sample approval at another hoodie factory

Sources