LEE Filters make visibly opaque, infra red transmitting filters for IR photography on both film and digital. Please see the Technical Filter section of the site for more information.
Please note that some digital cameras are not suitable for IR photography without specialist conversion.

LEE 87C absorbs all visible light up to approx. 780nm
It is primarily used as a camera filter for infra-red photography.
The filter can be used as a lighting filter to produce an infra-red source, providing there is sufficient air gap so that the surface temperature of the filter is less than 100oCelsius.