Basic chrome sulphate is one of the most important chemical used in tanning of leather. More than 90% of the world’s leather is tanned using chrome sulphate and it has long been regarded as the most effective and efficient tanning agent.
It is manufactured by the simple reduction of hexavalent chromium to it’s trivalent stage using sulphur dioxide.
Due to the anionic nature of powder chrome sulphate, it does not interfere with the negatively charged group collagen while penetrating in to the pelt. The anionic character gradually transforms to cationic nature which enables the chromium complexes to fix with the carboxyl groups of collagen during transformation. The chrome fixation is finally completed and accelerated by basification.
Due to the chromium penetration, hides once tanned with chrome leave a pale blue color which is popularly called “Wet Blue”
Our SOLACHROME® B is the standard grade for tanning, with 26% chrome content and 33% basicity.
For customers who require chrome with higher basicity, we can supply SOLACHROME® HB 42 and SOLACHROME® HB 50 with basicity 42% and 50% respectively.
Our special product SOLACHROME® SB which is self-basifying basic chrome sulphate already has a basifying agent hence there is no need for basification after chrome penetration. This makes tanning relatively easy as it eliminates the basification process.
SOLTAN® H is a retanning agent consisting basic chrome sulphate and some synthetic syntans.