Once disinfected and thoroughly leached, seaweed can be pressed like any other plant. Rather than spreading out the foliage by hand, however, try arranging the plant while it is still floating in the basin. Gently scoop a sheet of card stock underneath the seaweed and carefully bring them both out of the water together. This technique captures the plant's natural motion, creating a more beautiful and realistic-looking specimen.
The author gratefully acknowledges informative conversations with Judy Gibson of the San Diego Natural History Museum. For more information about this and other projects from the Amateur Scientist, check out the Society for Amateur Scientists's Web page. You may also write to the society at 4735 Clairemont Square, Suite 179, San Diego, CA 92117, or call 619-239-8807.