Bandhana means fixing an idol to its pedestal inside the sanctum sanctorum of the temple. Bandhana is recommended to be done regularly at 12 year intervals to infuse the deity with divine power.
Swarnabandhana is bandhana done with sheets made of pure gold, the noblest of all metals. This procedure adds beauty and durability, lasting easily for 100 years. Hence, the Swarnabandhana is the most durable, economical and sacred of all bandhanas.