The Solo Goya Masking Marker Medium works like a regular pump action marker, except that it dispenses masking fluid Extremely convenient and easy to use this 2-4mm medium stroke masking marker is designed for detailed and edge-sharp masking. This masking fluid is non-toxic, quick drying, water-based and is easy to peel or rub off. The blue colour of the fluid makes it much easier to see on the working surface, than regular colourless masking fluid. Together, these features enable the student and artist to have more control when masking. Remove from surface within two days of use. Combines boldness and clarity, making markings that stand out in creative projects.Encourages expressive designs where bigger strokes add personality and flair.Ideal for both sketching and emphasizing key details during art making.