Square Cardstock - Perfect for Spin Art Refills, Invitations, Photo Cards, & More. Premium 80lb Cover Cardstock (216 gsm) presents a nice thick feeling for your project Smooth Finish on BOTH sides of the Cardstock - Acid Free - Bright White (96 brightness) Printable with an Inkjet or Laser Printer (consult your printer manual to determine thickness & sizing compatibility) Square Cardstock by Desktop Publishing Supplies is perfect for your scrapbooking or DIY craft projects! This cardstock is made from a thick 80lb Cover cardstock (216 gsm) with a vellum finish. Printable on both sides with an inkjet or laser printer. Made in the USA.