![]() ![]() The Lulu Print Support Team is capable of determining if your color variance is outside of our acceptable levels. Color variance between orders is a physical limitation of digital printing technology. When shipping to multiple regions where multiple printers are used this variance can be more pronounced. Some variances in color may occur from order to order. We can’t guarantee that using sRGB and Gracol ICC will produce the file exactly as you see it on screen, but it is the best way to achieve a close match.Įach order is completed at a specific printer and press. Converting from CMYK to RGB will not prevent color variations. When creating original content for print, the sRGB color space and a Gracol ICC profile are recommended. Printing books will result in slight color differences (called ‘variance’) between your file on the screen and the printed version. The gamma of grayscale images should be between 2.2 and 2.4.If you are printing a color book that includes black & white images, the black & white images should have the colorspace set to grayscale.Below 20% tint variation is very difficult to control on a consistent basis. Avoid very light color builds of less than 20%.If you do add colors to improve the richness of the black, TAC (total area coverage) should never exceed 270%. Solid blacks will print solid at 100% with no other colors added. ![]() Changing color space settings after finalizing your file may result in undesirable color variance.If your file was created in CMYK, we recommend keeping this color space when exporting. CMYK - Works well for almost all printing needs.If you create your file using RGB color space, be sure to export with sRGB color space selected. sRGB - Our printers prefer files created using sRGB color space and can convert this to rich CMYK.Lulu's printers use sRGB and CMYK color space for all color printing. Include the bleed dimensions of 0.125 in and allow a minimum 0.25 in Safety Margin for all content (0.75 in for Hardcover Casewrap). ![]() The spine width is relative based on the number of pages in your book.
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