Fold your fabrics easily with the help of this Clover Fabric Folding Pen Liquid Refill. This bottle contains 8ml of marking solution, made specifically for use with the Clover Fabric Folding Pen. Simply fill the pen with water and add a few drops of this solution to activate its marking capabilities—perfect for creating fold lines with ease and precision. While the liquid may naturally turn yellow over time, this does not affect its performance. For best results, refer to the Fabric Folding Pen’s packaging for full usage instructions.