Sulfur printing test analysis
Tianjin Rong Da Testing Co., Ltd. contact: Wang Jingfu
Cell phone: 13102238283 QQ:3144667033
Telephone: 022-23892103
Sulphur printing test is a way to directly test the sulfur and indirectly test other elements in the steel.
Sulfur print test does not need operation in the darkroom, in general can indoor light is not strong.  
The principle of sulfur print test is: in the test process, and sample of paper sulfide sulfate on the function of hydrogen sulfide gas; hydrogen sulfide and interact with the photographic paper on the formation of silver bromide, silver sulfide deposition in the corresponding position paper on the formation of black or dark brown spots.
Where there is a dark brown spot on the sulfur printing paper, it is the site of the presence of sulfur compounds in the molten steel. The bigger the spots, the deeper the color, the greater the sulfide particles, the higher the content of sulfur. If the spots are small and sparse, and the color is lighter, then it indicates that the segregation of sulfur is lighter. The rating, according to the general photographic paper on the dark brown spots of color, size, number and distribution of sulfur print test is a qualitative test