Y&C® Calligraphy metallic markers write like melted metal. Stunning ink flows perfectly to create opaque coverage on light and dark papers. Sturdy 2mm nib has a sharp edge that holds up for the life of the pen. Water based and non-toxic ,you won’t find xylene fumes here. Once dry, the ink is water resistant and it works great on most glossy papers. Gold, silver and copper all in one fantastic set. All three invite creativity for beautiful handwriting, borders, calligraphy and Old English lettering. Gold and Copper are acid free. All are non-toxic and conform to ASTM D-4236.