The boiled pulp by weighing , heavy, 1 000 g .Put into a large pot coated with 4 sets of experiments. Each set with sodium hydroxide solution, concentration, and 1% 3% 5% 7% by weight, respectively.The concentration of each solution ีuse 3000 cubic centimeters. , Bring to boil, using a gas oven picnic temperature 102 degrees Celsius. Record the tissue that every 10 minutes, including 40 minutes since boiled pulp and the water begins to boil.