NEWS

25th September 2006
After some years of innovative research and development, Colourholographic Ltd is proud to announce that the ultra-fine grain holographic plates with panchromatic response BB Pan are now available from the manufacturer (click here to view prices of our BB coated plates). The exceptionally low scatter and high diffraction efficiency of the well known monochromatic emulsions that produced images of a quality not seen before has helped to develop this new product that will put display holography on a new level.
Display holographers who have made pre-production test on these new plates have found that they give unparalleled results more akin to DCG in their capacity to eliminate scatter and enhance the realism of the image when using the BB Pan plates for full colour holography.

The transmittance spectrum of the BB Pan plates shows sensitivity for the more common lasers used in holography: 442nm (HeCd), 458nm, 488nm and 515nm (Argon Ion), 532nm (Nd-YAG), 633 (He-Ne) and 647 (Kripton).
The sensitivity when using these plates for sequential (non simultaneous) recording of single beam reflection holograms (Denisyuk holograms) with a 532nm (Nd-YAG), a 633 (He-Ne) and a 442nm (HeCd) lasers (keeping this order) is about 100 μJ/cm2 for each of the exposures. The processing used for achieving this sensitivity is Pyrogallol developer and EDTA bleach.
As with monochromatic BB plates, BB Pan plates appear to become insensitive after a few weeks. This effect is overcome by presensitising the plates using a 3% solution of TEA (triethanolamine) or plain deionised (DI) water. In order to avoid colour shift, the surface of the plates presensitised with TEA must be washed with DI water.
Examples of holograms made with these exceptional emulsions can be seen in our gallery.