d. After the fire ie permitted 

 to die down, the temperature of the batch 

 drops ahout 1° C per hour. When the gelidiim 

 from the second boiling is added, the temper- 

 ature drops another 3° , meilcing a total 

 reduction of 17° to 20°. The temperature of 

 the batch at the completion of the process 



is between 80° and 83° C. As the tempera- 

 ttire drops, the seaweed settles to the 

 bottom of the tank, madcing the dipping out 

 of the liquor a simple process. 



e. The residue of seaweed 

 from each batch is placed in another tank 

 and about 1,230 liters of water ej:e added. 

 This mixture is boiled for 10 hours and 

 strained separately. The strained liquid 

 from this batch is called the "second boil- 

 ing". It is added to the next regular batch 

 in the manner previously described. 



"Transporting" 

 clean seaweed 

 from washing 

 sheds to boil- 

 ing tanks. 



f . The residue seaweed from 

 the second boiling is dried and used as a 

 fertilizer. From 225 kilograms of raw 

 materiad, approximately 52 kilograms of sea- 

 weed residue are left. As this materisd is 



rich in potassium and contains some nitrogen smd lime, and as a critical 



shortage of potassium fertilizer exists in Japan, the residue is valuable. 



Host of it is used on farms belonging to owners and employees of the 



plants. The balance is sold. 



3. Straining and solidifying 



a. The mother liquor containing the gelidi-um jelly in sus- 

 pension is dipped from the boiling vats into straining teuaks (Figure 6). 

 The tanks are about 5 by 3 by 2.5 feet in size and are perforated on the 

 bottom and lined with small bamboo rods. A filter cloth is placed in 

 the tanks for straining. This cloth, which is made of cotton, is referred 



to as a 20-me8h filter and contains 400 

 holes per square inch. About two hours 

 are required to strain one batch of 

 liquor, 



b. The strained liquor 

 drops into a collection tank which is 

 about 12 feet long, 6 feet wide, and 

 3 feet deep (See sketch). The tank 

 bottom is pitched so that the liquid 

 will gravitate to one ena as the gelatin 



