PURPOSE: To enable polarized regular reflection infrared spectroscopic analysis by vacuum-depositing a thin metallic film on a plastic surface, and then transferring it on a support and at the same time transferring a bleed product.

CONSTITUTION: A thin metallic film with good infrared reflectance is vacuum- deposited on a plastic surface by means of resistance heating, etc. Then after a support and the thin metallic film are hardened and adhered, the support is peeled off the plastic to transfer the thin metallic film on the support and at the same time a plastic surface bleed product is transferred. Thus polarized regular reflection infrared spectroscopic analysis of a bleed product to be analyzed is possible.