"The Kanda Water-Erasable Extra Fine Point Blue Pen ""Chacopa"" by Mother Land for pattern transfers, embroidery and quilting designs is excellent to use for projects which need fine marking. Extra fine point: Minimum 0.5mm with a smooth writing touch. Easy to erase marks with water. Replace the cap tightly and keep the blue pen away from heat and moisture. Do not press hard to avoid damaging the fine point tip. Always test a blue pen on the fabric you are using to make sure that marks will completely disappear. Remove marks as soon as possible; do not iron over marks or launder before completely removing with plain water."