Fuel your imagination with astronomically bright "Flourescent" 5-Color Assortment. Each sheet is boasts a vivid color for documents and projects that command attention. Astrobrights Mega Collection features all the things you love about Astrobrights, in a larger pack. The 24 lb. basis weight paper makes single and double-sided printing bleed-free. Each sheet is lignin and acid-free for long-lasting results. Save on colored ink with vibrant color paper, just add black ink! Brighter colors. Brighter ideas.