Pacon P6312 Peacock Sulphite Construction Paper, 76-Pounds 12 x 18 Inches Black, 50 Sheets/Pack (PACP6312) Enjoy vivid, clean colors that withstand sunlight and resist fading. Long, strong sulphite fibers provide rigidity needed for projects so that they stand up without support. This heavyweight paper can be folded, scored and curled without cracking. Acid-free.