Registering the different colours needs to be done very carefully, but there is a trick that helps: when the main block, here the black areas, has been cut, a print can be made and transferred onto a new block. The paper with the wet ink from the first block is left attached to the press and the new block is inserted without any ink. Then the press 'prints' from the paper onto the new block. This gives a guide for cutting. Here the colours were done as a reduction on one block, first the yellow and then the blue, followed by the black ink from the original block.