Pressing Is Not Ironing: Lift, Place, Press — and It Is Half the Construction

Set the iron down, hold it for a few seconds, lift it straight up, move it, and set it down again on the next section — overlapping a little each time. Heat, moisture and pressure do the work, and all three need a moment in one place. Sliding gives the cloth none of that and adds a sideways force it does not need. Test the temperature on a scrap first, every time the fabric changes. Synthetics melt, wool scorches, and the mark is permanent — which makes a ten-second test on an offcut the cheapest insurance in the whole process.

Press the seam flat exactly as it was sewn, with both allowances still together. That embeds the stitches into the cloth and settles any small unevenness in the stitching. Then open the allowances and press them apart, or to one side. Only then is the seam finished — and doing the second step without the first leaves a seam that looks puckered no matter how much it is pressed afterwards. Press from the WRONG side wherever possible. The right side is where shine, iron marks and impressions of the allowance edges show, and a pressing cloth between the iron and the fabric prevents all three when the right side cannot be avoided.

A flat board presses a flat seam. A curved seam — a bust dart, a sleeve head, a shaped side seam — pressed flat is pressed into a shape it is not meant to have, and it will fight the body ever after. A tailor's HAM is a firm curved cushion for exactly this. A rolled towel or a tightly rolled piece of cloth does the same job for very little, and is worth making before the first fitted garment rather than after it. Press darts over a curve with the fold going in the direction the pattern says — vertical darts toward the centre, horizontal darts downward, as a rule. The direction is what makes the garment lie smoothly, and it is decided by which way the bulk of cloth should fall.

Cloth sets as it cools, not while it is hot. Lift a hot pressed seam and move it and it will take the shape it cools into, which is the shape of wherever you put it. So press, then leave the piece flat and untouched for a few seconds. A clapper — a block of hardwood pressed onto the seam as the iron lifts — makes this deliberate: it holds the shape and draws the heat out, and it is how a really flat edge on a lapel or a hem is made. The same effect explains why steam matters. Steam relaxes the fibres so they can take a new shape; the cooling is what fixes it. Steam with no cooling time is half the operation, and it is the half people skip.