Value document substrate, and laminating a value document

The invention relates to a value document substrate for producing documents of value, in particular bank notes, having a front side and a back side, the front side of the value document substrate in a partial region a to UV-radiation-sensitive safety feature and the to UV-radiation-sensitive safety feature protective having transparent, impervious to UV radiation substantially film, wherein the value document substrate is impermeable at least in the partial region of the opposite UV-radiation-sensitive security feature to UV radiation substantially.