Security element with pattern and double-sided holographic effect

A method for manufacturing a security element, comprising:

• forming a first layer from a transparent material,
• forming a first holographic surface structure on the first layer,
• metallizing the first layer to form a first metal layer,
• forming a second layer from a radiation-sensitive polymer,
• forming a second holographic surface structure on the second layer,
• metallizing the second layer to form the second metal layer,
• forming a pattern of a coating on the second metal layer, said pattern comprising regions covered by the coating and regions uncovered by the coating,
• removal of the metal in regions of the second metal layer which are uncovered by the coating through de-metallization,
• exposing the de-metallized regions of the second layer to light or radiation, so as to transfer the radiation-sensitive polymer in the de-metallized regions into a soluble state and removing the soluble radiation-sensitive polymer, and
• removing the metal in regions of the first metal layer that are not covered by the second layer through de-metallization,
• wherein the first holographic surface structure of the first metal layer is different from the second holographic surface structure of the second metal layer, so that the security element displays a first holographic effect, when inspected from one side in reflected light, and displays a second holographic effect which is different from the first holographic effect, when inspected from the other side in reflected light.