A partial view of the mixing room at the 12th Ave plant reveals considerably larger mixers (on right) capable of making 3000 lb. (1350 kg) batches of black ink. Mixers are large enough to need at least 1000 lb (450 kg) minimum batch size to cover the mixer's impeller blade with adequate raw materials. More than 300,000 lbs. (135,000 kg) of dry carbon black pigment is stored in skids of bags on left. At peak capacity, the mixers in this room can produce over 20,000 lbs. (8500 kgs.) per hour.