maggie Just looked on the manual which doesn't directly refer to card, but this bit might cover it.
HP Brochure Paper or HP Superior Inkjet Paper
• These papers are glossy-coated or matte-coated on both sides for two-sided use. They are the perfect choice for nearphotographic
reproductions and business graphics for report covers, special presentations, brochures, mailers, and calendars.
HP Premium Presentation Paper or HP Professional Paper
• These papers are heavy two-sided matte papers perfect for presentation, proposals, reports, and newsletters. They are
heavyweight for an impressive look and feel.
Hope that covers it - you can probably print on the thick paper or card you want to, baically x