Not recommended for dry clean only fabrics. Always test marking pen on the fabric you are using to be sure marks will completely disappear. Some fiber contents, fabric finishes or dyes (red and pink in particular) may not be suitable for use with this pen.
Do not iron over marks or launder before completely removing marks with plain water. Some laundry products containing sodium hydroxide or sodium carbonate may “set” marks if they are not completely removed before laundering.