These are the markers I use or have used in the past. My favourite now is the Sewline. It fades after a day or a few hours, depending on the fabric and weather. I tested at night, and the lines were almost gone by morning. These are good. They disappear when the garment is ironed, they come in blue, red, black and white. The black doesn’t last long, and the white is no good at all. They are refills, but I’ve never bought the pen; they work just fine. These are water erasable and are OK to draw around a pattern or on the wrong side of a piece, but I wouldn’t use them where the marking will show. The top one has a little brush in the other end to wet and remove the markings. For dark fabric, there is good old French chalk and a rotary marker which works very well, it’s filled with powdered chalk and leaves a dotted line. Once again, the white pen doesn’t work. I bought a French Chalk sharpener; I find that the action of dragging it across the fabric not only blunts it but polishes ...