Puckered zipper after pressing
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A zipper tape that ripples once pressed, though it lay flat while sewing, comes from ironing directly over the teeth and tape without support underneath. Press from the wrong side over a seam roll.
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Pressing shine
A shiny, flattened patch on fabric after ironing comes from too much heat and pressure crushing the fibers, common on wool and synthetics. Press with a pressing cloth and let steam, not pressure, do the work.
Flattened pile fabric
Corduroy or velvet that looks crushed after ironing comes from pressing directly on the pile with a flat iron sole. Press face-down on a towel or use a needle board so the pile can stand.
Iron-on interfacing bubbling
Interfacing lifting away from fabric in little bubbles after fusing comes from too little heat, pressure, or time, or sliding the iron instead of pressing straight down. Re-fuse with steam and firm, held pressure.
Scorch marks
A brown or yellow mark burned into fabric comes from an iron too hot for the fiber, or leaving it in one spot too long. Test heat on a scrap first and keep the iron moving.
Seam allowance show-through
Ridges from seam allowances visible on the right side of lightweight fabric come from pressing directly over the seam without protection. Press over a seam roll or slip paper strips under the allowances.
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