USESSBL-1 is hexasulpho-type brightener to be used exclusively for aspplication in surface coating and size press liquids.It imparets high to very high whiteness to the treated paper.SBL-1 in surface coatingsSBL-1 gives high and very high whiteness when applied in surface coatings with natural and synthetic binders and commercial pigments at PH 7-11.The effect depends on the type and amount of co-binders such as CMC,PVA and synthecic products.SBL-1 at the size pressSBL-1 can be incorporated in size press liquids based on solubilized and/or modified starches and applied in combination with PVA,CMC and liquids containing pigments.Performace is almost not affected by the base paper PH.

PROPERTIESChemical constiuition:Dervivation of stilbene disulphonic acid Appearance:Clear,yellowish to yellowish-brown liquidWhitening intensity:100±3 points compared with standerdSpecific gravity(25℃):About 1.1g/cm3Storage stability:SBL-1 has good stability to storage and cold temperatures.Prolonged storage at temperatures below-10℃can result in product freezing.Frozen procuct can be restored to its original state withourt loss of effctiveness by leaving to stand at room temperature or heating briefly to temperatures no higher than 50℃.

SHADESBL-1 gives a slightly reddish white in all applications.Even at high concentrations it does not green off.

ECOLOGY/TOXICOLOGYThe usual hygiene and safety rules for handling chemicals should be observed in storage, handling and use. The produc must not be swallowed.

APPLICATIONSBL-1 in coating SBL-1 can be used to produce high and very high white coated papersSBL-1 does not have adequate affinity for coating pigments and synthteic binders,are therefore essential in amounts of about 1.0% if the best effects,i.e. the highest whiteness, are to be achieved with SBL-1.Suitable carriers, in order of their effectiveness,are PVA,CMC,starch and synthetic co-binders.It can be incorporated in coating compounds ranging in PH from 7-11.Average dosage:1.5-4.0 parts,calculated on the coating pigment.SBL-1 at the size pressSBL-1 SBL-1 has been developed for high and very high levels of whiteness which cannot be achieved with other whitener due to greening.Having only moderate affinity for the cellulose fiber, SBL-1 at size press allows for a highly uniform whiteness.It is equally effective with all starches used in size press application and can be applied together with PVA,CMC,anionic and slightly cationic, and synthetic sizing additives.Average dosage:5-40g/l size press liquor