Technical Index:       

(GB/T10500-2000)       

Index Item   Index    

             First Quality: Qualified  

Content of Sodium Sulfide,%: 60, 60  

Content of Iron(Fe),%: 0.003, 0.0054  

Content of Water Insoluble,%, 0.05, 0.1  

Content of Sodium Carbonate,%: 2, 3 

(Q/FH04-2005)       

Extraordinary Good: Best Quality 

Content of Sodium Sulfide,%: 60, 60, 60, 60 

Content of Iron(Fe),%: 0.001, 0.002, 0.003, 0.005 

Content of Water Insoluble,%: 0.01, 0.01, 0.05, 0.1 

Content of Sodium Sulfite,%: 0.3, 0.4, 

Content of Sodium Thiosulfate,%: 0.8, 0.8   

Content of Sodium Carbonate,%: 1, 1.5, 2, 3 

Appearance: Yellow,flaky,even,no agglomeration Thickness2mm.