将高分辨率 PDF 保存为可用尺寸而不损失分辨率
我拿了一个Word文档，将其转换为高分辨率PDF，然后在PS中将其转换为CMYK。因为它是一本小册子，我有 100 页，所以我将这些页放在 ID 中。当我将其保存为高分辨率 PDF 时，我的文件现在为 750MB。如何将用于打印制作的高分辨率 PDF 保存为可管理的大小而不丢失分辨率。
I took a Word doc, converted it to a high res PDF, then converted it to CMYK in PS. Because it is for a booklet and I have 100 pages, I then placed the pages in ID. When I saved it to a high res PDF my file is now 750MB. How do I save a high res PDF for print production to a manageable size with out losing my resolution.
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首先，整个问答不属于 StackOverflow（这是针对编程问题的），而可能属于超级用户。
无论如何，回答你的问题：你不知道。
与网络或屏幕媒体相比，印刷制作需要高分辨率。通常，印刷件使用每英寸约 150 至 300 线的半色调进行印刷。 （这是半色调点的线，而不是像素或构成半色调单元的点。对于大多数印刷品来说，150 是典型的，对于艺术书籍和更精细的产品来说，200 及以上。）要创建没有明显像素化或退化的印刷图像，您可以想要半色调屏幕像素分辨率的 1.5 倍左右。 （有关此技术信息，请参阅 Adobe、Quark 或 Corel 打印指南。）这意味着使用 150 行屏幕打印时，您需要大约 300 ppi（每英寸像素）的图像。请注意，这是未缩放的 300 ppi。因此，放置一个 300 像素见方的小图像并将其拉伸到 2 英寸见方是行不通的；当它在压板上成像时，ppi 只有 150。
CMYK 图像的四个通道均为 8 位。 8x10“整页”图像有 720 万像素。 720 万乘以 8 位乘以 4 = 2.304 亿位，即 28.8 兆字节。如果 100 页文档的每一页上都有这样的图像，则整个文件的大小应高达 2800 MB 左右。由于压缩，并且您可能不会在每个页面上都有大图像，因此它要小得多。
First, this entire Q&A belongs not on StackOverflow, which is for programming questions, but instead probably on Superuser.
Anyway, to answer your question: You don't.
Print production demands high resolution, compared to web or screen media. Typically a printed piece is printed using a halftone of about 150 to 300 lines per inch. (That's lines of halftone dots, not pixels or the dots that make up the halftone cells. 150 is typical for most printed items, 200 and up for art books and finer products.) To create a printed image without noticeable pixelization or degradation, you want about 1.5 times the pixel resolution of the halftone screen. (See Adobe, Quark, or Corel print guides for this technical info.) This means you need an image of about 300 ppi (pixels per inch) when printing using a 150 line screen. Note that's 300 ppi unscaled. So placing a small image that's 300 pixels square and stretching it to two inches square won't work; it's only 150 ppi when it gets imaged on the press plate.
CMYK images are 8-bits for each of four channels. An 8x10 "full page" image is 7.2 million pixels. 7.2 million times 8 bits times 4 = 230.4 million bits, or 28.8 megabytes. If you have such an image on every page of a 100 page document, the entire file should come in around a whopping 2800 MB. Thanks to compression, and the fact that you probably don't have a large image on every page, it is much smaller.
问题的解决方案取决于您如何执行不同的步骤。从 Word 转换然后在 Photoshop 中转换为图像可能不是最好的方法。
如果您只想按原样使用此 Word 文档，请将其另存为 PDF。对于图形艺术来说，这将是一个有点“有挑战性”的 PDF 文件，因为 Word 会给你一些可能是 sRGB 的东西。不要使用 Photoshop，而是使用 pdfToolbox（我与这家公司有关联）、Adobe Acrobat、PitStop 或类似工具将 PDF 从 sRGB 转换为 CMYK。该工具应该能够执行此操作，而无需对 Word 文件中还不是图像的任何内容进行光栅化。
如果您想以此制作一本小册子，请查看可以在 PDF 中执行此操作的工具；再次使用 pdfToolbox 或类似相当令人印象深刻的东西。同样，您的小册子将被创建，而不会破坏文件中已有任何内容的质量。
如果这听起来像是一种复杂的做事方式，是的，这是正确的。但如果使用 Word 等工具，您需要执行一些步骤才能获取正确的文件。当然，如果您从 InDesign 开始，那就更容易了。
The solution to your problem will be with how you do the different steps. Converting from Word and then to images in Photoshop is likely not the best way to do things.
If you simply want to use this Word document as is, save it as PDF. This will be a somewhat "challenged" PDF file for graphic arts because Word will give you something that is likely sRGB. Instead of using Photoshop, use a tool such as pdfToolbox (I'm associated with this company), Adobe Acrobat, PitStop or similar to convert the PDF from sRGB into CMYK. The tool should be able to do this without rasterising anything that isn't already an image in the Word file.
If you want to make a booklet out of this, look at a tool that can do this in PDF; pdfToolbox again or something like Quite Imposing. Again your booklet will be created without ruining quality of anything that is in the file already.
If it sounds like a convoluted way to do things, yeah, that's correct. But coming from a tool like Word, you'll need some steps to get to a correct file. It's easier if you start out in InDesign of course.