Tilak is a ritual mark on the forehead. It can be put in many forms as a sign of blessing , greeting or auspiciousness. The tilak is usually made out of a red vermilion paste (kumkum) which is a mixture of turmeric, alum, iodine, camphor, etc. It can also be of a sandalwood paste (chandan) blended with musk.
The tilak is applied on the spot between the brows which is considered the seat of latent wisdom and mental concentration, and is very important for worship. This is the spot on which yogis meditate to become one with Lord Brahma. It also indicates the point at which the spiritual eye opens.
All thoughts and actions are said to be governed by this spot. Putting of the coloured mark symbolizes the quest for the ‘opening ‘ of the third eye. All rites and ceremonies of the Hindus begin with a tilak topped with a few grains of rice placed on this spot with the index finger or the thumb. The same custom is followed while welcoming or bidding farewell to guests or relations.