we are the manufacturer of specialized in sulphur black . we have the export office and warehouse in tianjin city. our supply ability is 20,000mts per year and we will enlarge our market in the next two years. our main products: sulphur black br 240%(yabulai) sulphur black br 220%(yabulai) sulphur black br 200%(yabulai) sulphur black br 180%(yabulai) sulphur black br 170%(yabulai) sulphur black br 160%(yabulai) sulphur black b 160%(yabulai) sulphur balck b 170%(yabulai) sodium thiosulfate