These rich color inks may come in a small package, but they perform beyond their size. Diluted in water, they keep their vibrant quality. Straight out of the bottle, they apply smooth and bright. Winsor & Newton's professional quality ink range was especially developed for your writing and calligraphy needs. Most of the colors in the range are transparent, thinner in formulation, and fully intermixable, which makes them suitable for dip pens, fountain pens, technical pens, and airbrushes. Black, White, Silver, and Gold are thicker and more opaque, and should be used only with a dip pen or brush. This rule also applies to any mixtures containing these four colors. Black and White have a matte finish. Silver and Gold have a metallic finish.