Depending on the workflow used by the printing service provider and the nature of the job you are submitting, the proofs may need to be checked at various stages of job production. You may have been checking the same content for a long time. They all started to look the same, and when you are anxious to sign the sample, it is easy to blind spot and ignore some important issues. Below we will list some issues that you should pay attention to when checking proofs at various stages of production. Check image proofs Image proofs are sometimes referred to as random proofs or spread proofs, and because these proofs have only images, there is no information about page layout. If you do not know how the scanned image or digital photograph will be copied, or if the printing service provider has already completed the scan for you, you may need to check the image proof before proceeding to the next production step. . Check the following parameters: size. Is the image size correct? If you want to reuse multiple images of the same size in a project, check that each image has the correct scaling. Cutting. When you plan to place an image in a page layout, can it fill the entire target area? Do not cut the contents that should not be cut. In addition, if you only need to use a small part of an image, you can cut out the useless images to save storage space and speed up processing. direction. Determine if the image you are working with is to be used horizontally or vertically in the final layout. angle. Is the current angle of the image the same as the angle it used in the finished product? Match the original. Does this proof sheet truly reproduce transparent originals, reflective artwork, or digital photos? The degree of match between proofs and manuscripts is sometimes a subjective assessment, but we can check whether the proofs match the originals using only CMYK four-color paints. color. Are the proofs too dark, too bright or lacking in contrast? Are neutral colors such as white, gray and black printed with unwanted colors? For example, gray areas such as concrete or asphalt should be carefully inspected to ensure that they are not printed in red, blue or green. detail. Is the detail of the highlights and shadows of the image legible? If the original image or the original itself lacks details, then we do not have to consider this issue during the copying process. However, if the customer has the details on the original, we must retain them. Moire stripes. Especially when shooting or scanning originals with patterns (textile fibers, geometric patterns, etc.), we need special treatment of the images. Sometimes we can use "slightly blurred" options in Photoshop to avoid the appearance of moire. You may also want to determine which of the conditions you can't tolerate at all—whether it's a hateful Moire fringe or the details of the image lost after obfuscation. Outline map. This is a great opportunity to check the edges of the images, whether you have created them yourself or have the printing service provider create them for you. Some on the screen feel acceptable outline to actual proofs is not the case, you may also need to clean up. Retouch. If you have asked the printing service provider to retouch the product, can the samples you get show this effect? Do you need additional processing of proofs to achieve the effect you want? Is there any problem in this proof sheet that has not been shown before and needs to be solved?