Once you've finished your album and you're ready to export, click the export icon and choose to Export for Print.
You will be prompted to choose an export location.
Pages: You can choose to export the entire range of pages in your album or you can select a range of pages to export individual spreads.
Color Profile: You can choose a color profile for your exported album spreads. (sRGB, Adobe RGB, Match Images).
Export File Names: You can toggle this on to export your spreads with the filenames showing for each image in your spreads. This can be useful for proof books and client previews of your album.
Once you've selected your options, click the Export button to being the export process.
Once you click the Export button, your export will begin. A progress bar will display showing you the export progress.
Once the export process is finished, you'll be reminded to double-check your exported spreads before sending them to your lab.
You can find more information about Ordering, Exporting, and Proofing your projects here.