The seaweed can be sold by the farmer at different stages (see supply chain overview below). In some cases the farmer has his or her own processing and brand and sells directly to consumers. In others, the (usually raw dried) seaweed will go through the hands of more traders before it is processed and reaches the final customers.
Initial Pyropia harvests tend to be softer and have a better taste. Pyropia that has grown for 50 days is considered best for consumption as the colour and flavour are at their peak.
Harvesting boats line up at 11 am sharp every day in Jindo, South Korea.
The unit of sales in South Korea are 120kg bags.
The buyers at the auction are going around to check the quality of the biomass.
Bids are made based on the previously graded biomass.
After the auction is finalized, the seaweed will be loaded on to processors' trucks. (Photo courtesy of Dr Heo JS)
In South Korea, all Pyropia farmers sell freshly harvested seaweed straight from the harvesting vessel through the auctions that take place every morning during harvest season at the farmers’ cooperative port. There are different quality categories for the auction and prices fluctuate according to the abundance of supply. The auction is open to any potential buyer, but primary processors usually produce dried-sheet Pyropia. There are between 350 – 400 factories in South Korea that produce these sheets and sell them either to consumers directly, to other domestic processors for further processing steps into seasoned Pyropia or as export products.
Evaluating nori sheet in the market in China (Photo courtesy of Li-En Yang)
Traceability from farm batch to product is standard in Korean Pyropia industry
Pyropia (Nori sheets) have become popular as snack food - toasted and seasoned in all kinds of flavours available.
In Japan and China, primary processing is usually carried out by farmers or farming companies with an automatic machine that produces dry nori sheets. The dried nori sheets are bundled into 10 sheets each and then graded according to quality.
In Japan, these sheets are sold through open tenders at the fishery cooperative’s auction and sent to department stores, restaurants and supermarkets.
In China, only Jiangsu province has a farmers association, which unifies the sales process through an open auction. 95% is sold through this open market, where Korean or Japanese companies buy for secondary processing. Prices are relatively stable when compared to areas that do not have farming associations like Jheizhang and Fujian provinces.