Five image formats not suitable for printing
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Every day we come into contact with various image formats during the purchase of printed images, file creation and file preflight, for example: PNG, BMP, GIF and JPEG, etc. But we often don't know what these abbreviations mean and which image formats are better for print production.
With these points, you may not waste too much time in supervising production.
1. Some image formats are suitable for use on screens and networks. For example, PNG (short for Portable Network Graphics, meaning portable network image) can contain image elements such as RGB, index color, and transparency. Although PNG images can achieve higher resolution, it does not have the ability to support CMYK color space.
2.Windows format BMP (abbreviation of bitmap) can support color depth from 1 bit (black and white, no gray level) to 32 bits (millions of colors), but does not have support for CMYK, so It is also not suitable for printing.
3. GIF (abbreviation of Graphics Interchange Format, meaning the graphics exchange format) is only suitable for use on the network, because its original resolution is relatively low, and can only call up to 256 colors. So don't use GIF images in printing.
4. The name of JPEG (short for the Joint Photographic Experts Group) comes from the committee that created it and enjoys a very high reputation in the printing industry. It is a lossy compression algorithm, in other words, it throws away some of the information in the image in order to generate a smaller digital file.
5. If an image has a sufficiently high resolution, printing with a slightly compressed JPEG file will not significantly destroy the quality of the image, but if there is too much information being compressed, then there will be a rectangle in the image. Deformation occurs, especially in the detail area.
It can be seen that printing is not a free-flowing process. Only by choosing the correct image format can we lay a solid foundation for perfect printing production.