Abstract: Flexographic printing plates are mounted in precise registration on printing press cylinders for multicolor printing using a registration apparatus. In the preferred embodiment, the apparatus has a support on which a cylinder can be locked in fixed axial and circumferential position. A pair of pin holders slide on a bar parallel to the cylinder axis to set registration pins in precise positions relative to the surface of the cylinder. The bar moves toward the cylinder and places the pin bases on the cylinder surface so the plate is registered on the pins and adhered to the cylinder along the plate centerline and then across its back. The pin holders are set from a template that matches the plates. The locked pin holders and cylinder support allow additional plates to be similarly mounted on other cylinders in precisely corresponding positions, from their centerlines, with reduced error.