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Content: They are then made into  sheets by a process of shredding and rack-drying that is similar to the one  used in papermaking. The result is what  you often see in stores: a pack of paper thin, dark colored, dried sheets of  nori which are approximately 18 x 20 cm and 3 grams in weight. Porphyra  plants have become so popular that porphyra cultivation is the second largest  sub-industry in Japanese aqua farmingwith a production of 10,326 million nori  sheets in 1998. The total production  value of nori is about $2 billion per year when valued in US currency. Nori can be  bought either in raw or toasted form. If  you buy it in raw form, you will need to toast it before putting it to  use. Nori will be crispy and will have a  salty taste. There are  many uses for Nori. While kombu seaweed  is used most often for soup or nabe dishes and wakame is used for soups and  sunomono salads, nori is used in sushi dishes, for rice balls, and as part of  noodle and other dishes.