For projects that are out-of-this-world, Astrobrights colored paper, in Spectrum 25-Color Assortment is the perfect choice. Astrobrights paper is 20% thicker than standard paper, so you can achieve bleed-free results for single and double-sided documents. Creative geniuses and novices alike, can create vibrant brochures, school projects, signs, coupons, and DIY paper crafting! Plus, this color paper saves money on pricey full-color ink while acting as the perfect canvas. Astrobrights paper is also lignin-free and acid-free so your creations won't yellow over time. Brighter Colors. Brighter Ideas.