Photoshop slidesPhotoshop slides
You can also make photographic slides from your Photoshop images. This time work with rulers set to inches (File Menu, Preferences, Units). Open a new file with the dimensions 7.5" x 5", landscape or portrait with 350 dpi resolution. At this dimension the entire slide will be filled. The images need to be higher resolution than those used for web images. I've used 350 dpi resolution with good quality results but you can go higher.
Assemble and compose the plate using the methods for B & W plates.
Note: If you find that an individual image is too small for your slide, delete its layer, go back to its raw image and enlarge the image dimensions by resampling (under Image Size in the Image Menu; Select [X] Constrain: Proportions; (In Adobe Photoshop 3.0) Deselect [ ] Constrain: File size (Important!). (In Adobe Photoshop 5.0: Select [X] Resample Image: choose Bicubic); Choose % enlargement in the width or height; resolution remains at 350 pixels/inch). With this new enlarged image, then proceed to drag layer and compose plate as before.
If you wish, leave space between the individual photos. Fill excess white background with color. Use the eyedropper [A] to choose a dark color from one of the images and then, working in the background layer fill it using the paint bucket [B]. The result is a composite image slide on a dark background.
Save your slides as tiff files and send them to a film recorder. At 350 dpi resolution each slide takes about 3 minutes to print to the film recorder (longer if the file size is very large). You can also create these composite slides in a presentation software like PowerPoint but the resolution may not be as sharp as what you get with Photoshop.