Washable Wonder Fabric Marker Blue makes a bright blue mark on fabric that can easily be removed with plain water. This marker works great on lighter color acrylic fabrics, like Sunbrella. Not recommended for use on dark fabrics (we suggest a lighter marking pencil instead).
To use: Be sure to always test the Wonder Marker on a spare swatch of fabric before using to make sure marks remove to your satisfaction. On rare occasions, certain dyes in the material (dyes containing red in particular) may make marks difficult to remove. When encountered mark lightly on the wrong side of the fabric instead. To remove markings, rub the fabric gently with a well-moistened cloth. Occasionally the mark will reappear when the fabric dries. If this occurs, simply repeat the process.
CAUTION: Be sure marks are completely removed with plain water before laundering. Some laundry products containing more than 3 percent sodium hydroxide or more than 5 percent sodium carbonate may cause the marks to turn a brownish color if they are not removed before laundering. Do not iron over marks before removing them as on some materials it will set marks permanently.