What temperature do I press Siser EasyWeed at on a cotton shirt?

305°F (152°C) for 15 seconds with medium pressure, hot peel. If your press runs hot, 300°F is fine. Cover with parchment paper. Pre-press the garment 3 to 5 seconds to pull out moisture before you lay the vinyl down. These are the numbers Siser publishes on their current instruction sheet; they have not changed significantly in 5 years.

Why does HTV lift at the edges after washing?

Three usual suspects, in order of likelihood. One, not enough pressure. HTV needs real firm pressure, not just weight resting on the press. Two, peeled too early. Hot-peel HTV needs to be peeled within a few seconds of opening the press; cold-peel needs to be fully cool. Peeling in the warm middle lifts edges. Three, not enough post-press. Always cover with parchment and press again for 5 to 10 seconds after peeling.

Can I use a home iron instead of a heat press?

For a handful of shirts, yes. Use the cotton setting (no steam), press for double the recommended time, and apply firm pressure leaning your body weight in. The hard part is heat distribution. Irons have hot and cold spots; the press will look fine but edges may fail. If you sell HTV shirts at all regularly, a Cricut EasyPress or a cheap flat press ($130 to $300 range) pays for itself within 15 shirts from reduced rework.

What is the difference between hot peel, warm peel, and cold peel?

Hot peel means peel the carrier sheet immediately, while the vinyl is still hot. Warm peel means wait 5 to 10 seconds; the surface has cooled but is still tacky. Cold peel means wait until the carrier sheet is completely cool to the touch. Peeling at the wrong temperature is the most common vinyl failure mode. Always follow the manufacturer spec; guessing will lift edges every time.

Do I need different settings for different fabric types?

Yes, and polyester is the one that bites you. At 320°F+ on 100% polyester, the shirt dye sublimates into the white vinyl and turns it pink or gray. This is called dye migration. Use lower-temp HTV or a sub-block film for dark polys. Spandex and performance fabrics stretch during wear; use stretch-rated HTV (Siser EasyWeed Stretch, Cricut SportFlex) or the design cracks. Nylon bonds reliably only with Siser StripFlock Pro.

How long should I press glitter vinyl?

Siser Glitter: 320°F for 20 seconds, cold peel, medium pressure. Cricut Iron-On Glitter: 330°F for 30 seconds. Glitter needs more time than standard HTV because the textured surface traps air that needs to be pressed out. Cover with parchment. Do not stack glitter on top of other vinyl layers; it will not bond cleanly.

What pressure setting should I use?

Firm for most applications (especially glitter, flock, and anything textured). Medium for standard EasyWeed on cotton. Light almost never for HTV; light pressure is for sublimation on coated surfaces like tumblers and mugs. A heat press with a digital pressure readout is gold; otherwise go by feel: "I can barely close the handle with one hand" is the firm target for a domestic press.

Reference tool

Heat Press Time & Temperature Calculator

Pick your HTV brand, product line, and garment fabric. The calculator returns the manufacturer-verified temperature, press time, pressure, and peel type. No more digging through four different PDF spec sheets every time you load a new shirt.

Step 1 of 4: HTV

Presets

Start with your HTV brand and product line. If your product is not listed, pick Custom and enter the settings from your manufacturer spec sheet.

HTV brand

Product line

Step 1 of 4

Recommended settings

Temperature

305°F

152°C

Press time

15s

seconds

Pressure

Medium

Peel

Hot peel

Pre-press the garment 3 to 5 seconds to pull out moisture.
Cover with parchment or Teflon before pressing.

The three settings that decide your press quality

A heat press has exactly three variables you control: temperature, time, and pressure. Plus the peel timing, which is technically a fourth but matters equally. Most HTV failures come from getting one of these wrong, and the wrong one is usually pressure because home presses do not have pressure readouts and operators undershoot by habit.

Temperature controls whether the adhesive on the back of the vinyl activates cleanly. Too cool and the vinyl will not bond; too hot and polyester dye migrates into the vinyl, turning white HTV pink or yellow. Every HTV has a tight 20-degree window.

Time controls heat penetration. The outside of the vinyl hits temperature fast; the adhesive underneath takes a full press cycle to reach the same temperature. Undershoot time and the adhesive is molten on top but barely softened against the fabric. Most "my vinyl peels off after one wash" posts are time failures.

Pressure is the step nobody talks about. Firm pressure (roughly 40 to 60 PSI on a domestic press) forces the softened adhesive into the fabric fibers. Light pressure sits the adhesive on top of the fibers and lifts after a wash cycle. If your press does not have a pressure gauge, aim for "I need both hands to close the handle."

Manufacturer reference table

These numbers come directly from manufacturer instruction sheets (Siser, Cricut, ThermoFlex, Stahls') verified in 2026. The calculator above covers every combination; the table here is the quick reference for the most common ones.

Brand	Product	Fabric	Temp °F	Temp °C	Seconds	Peel
Siser	EasyWeed	Cotton	305	152	15	Hot
Siser	EasyWeed	Polyester	270	132	10	Hot
Siser	EasyWeed Stretch	Cotton	305	152	15	Hot
Siser	Glitter	Cotton	320	160	20	Cold
Siser	StripFlock Pro	Cotton	320	160	15	Cold
Siser	StripFlock Pro	Nylon	320	160	15	Cold
Cricut	Iron-On Everyday	Cotton	315	157	30	Cold
Cricut	Iron-On Everyday	Polyester	295	146	30	Cold
Cricut	Iron-On Glitter	Cotton	330	166	30	Cold
Cricut	Iron-On SportFlex	Performance	295	146	15	Cold
ThermoFlex	ThermoFlex Plus	Cotton	311	155	15	Hot
Stahls	CAD-CUT Premium Plus	Cotton	320	160	15	Hot

Always verify against the current manufacturer sheet. HTV formulations change, especially with glitter and specialty films. The calculator data is reviewed quarterly but the source of truth is the PDF that shipped with your vinyl roll.

Three common mistakes that waste shirts

Mistake 1: Pressing without pre-pressing. Cotton garments absorb moisture from the air. Apply HTV over a damp shirt and the steam that escapes during the press lifts the vinyl. Always pre-press the blank for 3 to 5 seconds before you lay the vinyl. You will see a faint puff of steam; that is what you wanted out of there before the vinyl arrived.

Mistake 2: Peeling at the wrong temperature. Hot-peel HTV needs to come off within a few seconds of lifting the press. Cold-peel needs the carrier fully cool. The warm-but-not-hot middle window lifts the vinyl instead of leaving it on the shirt. When in doubt, wait longer for cold peel; waiting 30 seconds for a 10-second cold peel hurts nothing.

Mistake 3: Skipping the post-press. After peeling the carrier, put the parchment paper back on and press for another 5 to 10 seconds. This seals the edges of the design into the fabric and significantly improves wash durability. Shops that skip this get "my vinyl peeled after 5 washes" complaints; shops that do it consistently get the "my shirt from 2 years ago still looks perfect" reviews.

What about sublimation, DTF, and printable HTV?

This calculator covers cut HTV on apparel. Adjacent processes have different numbers. Sublimation on polyester apparel presses at 400°F for 60 seconds with firm pressure, hard pillow inside the shirt. Sublimation on a 20oz tumbler presses 360 to 390°F for 60 to 90 seconds in a mug press or oven. DTF (direct-to-film) transfers press at 320°F for 15 seconds, peel warm, then post-press after peeling. Printable HTV (like Siser EasySubli) is 311°F for 15 seconds, cold peel.

For tumbler sublimation specifically, see the sublimation pricing calculator. For full pricing on HTV shirts including the time you spend on this press step, see the Cricut HTV pricing calculator.

Frequently asked questions

Once the settings are dialed in, price the job

Heat press is step three of five. Pick the pricing tool that matches the product you just pressed.