Pigma pens offer the most reliable waterproof quick-drying pigment ink on the market today Artists consumers the government and scientists consider Pigma Micron a necessary basic tool for any archival-quality handwritten project Pigma ink is fade resistant and chemically stable on porous surfaces including 100 cotton fabrics The ink won t bleed during use and dries quickly to a neutral pH so it won t feather or smear - even if a liquid is spilled on the dried ink Use for graphics journaling scrapbooks memos illustration drafting archival recording cartooning and accounting Ideal for acid-free environments Micron Set of 6 Colors contains black blue red green purple and brown All 25mm 01 point size Micron Set of 8 Colors contains black red blue green brown purple sepia and rose Choose between 25mm 01 or 45mm 05 point sizes Micron 30061 Set of 3 Black contains one of each point size 25