This smooth, bright white paper delivers gallery-quality results that will resist fading for more than 200 years! A professional, acid-free media with 100% cotton rag, it is coated on one side and delivers rich, accurate color and excellent contrast.Guaranteed Compatibility with HP DesignJet Z2100, HP DesignJet Z2100 GP, HP DesignJet Z3100, HP DesignJet Z3100 GP, HP PhotoSmart Pro B9180 and HP PhotoSmart Pro B9180GP