With a special formula that creates the highest quality inks with the solid and original viscosity of each color, it proudly offers a solution for every artist's dream. Enhance your work with these inks to make it bolder and brighter than before. All world famous inks are vegan compatible and EU approved. They are sterilized by gamma rays and bottled in crystal flex bottles. Each bottle has a safety cap and a waterproof label against the shock absorber.