This dye based liquid behaves like watercolor but sets when dry to a semi permanent state. Hello, layerable watercolor. Use INKredible Ink as is or dilute with water for varied effects Use in the INKredible Fountain Pen Use straight from the bottle or fill Janes Ink Brush, Dauber, Mister or Fine Line Bottles Refill your Mermaid Markers with INKredible Ink.