We can only guarantee combined shipping when the combined mass of the orders reaches the minimum for an LTL freight shipment. In that case, we hold all of the orders until they are fully complete so they can be packed together on a pallet(s).
Combined shipping cannot be requested for any priority or expedited orders, as we need to ship these out as soon as they are completed. Holding them back to ship together poses a high risk for delaying the shipment of both orders.
Otherwise, we note that your jobs are related, but cannot guarantee combined shipping. Due to the prepress and manufacturing process, there is a possibility that they will enter production at different times or even on different production lines. If you have any questions about combining shipping on your particular order, please message our support team and we'll be happy to help!