PREMIUM HEAVYWEIGHT BLACK CARDSTOCK MADE IN USA — Professional black cardstock measuring 4.5" x 6.25" (A6), 80lb cover (216 GSM), with a smooth finish on both sides. Made in the USA from acid-free paper for archival-quality crafting and printing PERFECT FOR PHOTO MOUNTING, PRODUCT PACKAGING & CRAFTS — Ideal for jewelry packaging, photo book inserts, collector card sleeves, note cards, wedding place cards, party invitations, photo mounting, watercolor backing, and dramatic dark backdrops WORKS WITH LASER & INKJET PRINTERS — Compatible with laser and inkjet printers. Set printer to "cardstock" or "heavy paper" mode. Standard printers cannot print white ink — for visible writing, use metallic gel pens, chalk markers, or white paint pens DEEP, SATURATED BLACK ON BOTH SIDES — A rich, true black with a smooth, consistent finish on both sides. The deep tone delivers a dramatic backdrop for photos, white-ink calligraphy, metallic embellishments, gift packaging, and product display ELITE BOX PACKAGING & CONSISTENT QUALITY — Each 100-sheet pack is shrink-wrapped and shipped in a sturdy corrugated box for protection. Hamilco specialty papers deliver consistent thickness and reliable printing — order after order Hamilco Black Colored Cardstock Thick paper - Blank Note Greeting Invitations & Index Cards - Flat 4.5" x 6.25" A6 Heavy Weight 80 lb Scrapbook Card Stock - 100 Pack