Lux international is one of the oldest and popular brand especially in India.There are so many brand ambassador of Lux starting from Aishwar ya Rai Bacchan to Deepika Padukone.They all creating money but never go deep in product.They never do any research.
But I personally did litmus paper test when I brought it before 8months which turned the paper blue means having acidic in nature. They put lot of chemical in soap.It will never make your skin soft in fact damage the skin.