postcard printing Postcards are printed in full color on both sides on a 14-point C2S (coated 2 sides) Glossy Cover Stock. Aqueous coating is applied only on the front side. Amazing Photo-Quality Printing: Staccato 20, equivalent to 450-line screen.china printing Turnaround time is 5 business days, from approval of your proof. 3-Business Day Turnaround time is also available.