I think you're either talking about "anti-aliasing", or you're simply talking about a resolution issue.
Print is usually standard at 300 pixels per inch, and web standard is at 72 pixels. I'm not sure what you mean by your "product", if this is a screenshot of some software or if you're taking photographs and trying to put it into a printable page. Most likely, you'll need to get a higher resolution image. If you're making this image a PDF or some other print-standard quality image, the standard you should expect on high-quality prints is between 150-300 pixels per inch.
If you're adding text via photoshop, however, you can apply "anti-aliasing" in order to make the text more readable when you scale it to various sizes. Certain fonts take this better than others, and some are specifically designed not to be anti-aliased (monospaced system fonts, for example). This option is on the text tool context menu, and allows you to choose between "strong," "smooth," "crisp," or "sharp" styles.