PFG-03C Panchromatic Holographic Plates
Designed for full-color holography, the PFG-03C is an ultra fine-grained, panchromatic silver halide emulsion, appropriate for advanced holographers with the suitable red, green, and blue lasers.
- Full-color holography
- High resolution
- Ultra fine-grained
Available in plate formats listed below.
LIMITED SUPPLY / OUT OF STOCK: Interruptions in our supply chain stemming from the Russia-Ukraine conflict are significantly impacting our inventory levels, given that the holographic plates are manufactured in Russia. Thank you for your understanding and continued support.
PFG-03C Panchromatic Holographic Plates
High-Resolution Full-Color Holography
With an average grain size is 20-30nm and resolving power of more than 5000 lines/mm, the PFG-03C is capable of producing high resolution full-color holograms. The ultra fine-grain recording emulsion has a spectral sensitivity between 457-700nm and is best used in conjunction with CW laser radiation in the blue (457nm Argon laser), green (514nm Argon laser) and red (633nm HeNe laser). Recommended for intermediate and advanced holographers. Available in plate format.
| Characteristic | Specification |
|---|---|
| Spectral sensitivty | 457-700nm |
| Average grain size | 8nm |
| Resolving power | 5000 lines/mm |
| Exposure peak sensitivity | 2mJ/cm2 (blue), 3mJ/cm2 (red/green) |
| Emulsion thickness | 9-10µ |
| Glass thickness | 2.4mm |
| Diffraction efficiency | 45% |
| Processing | Details |
See spectral sensitivity curves
How to Process PFG-03C
A main concern in developing any emulsion for color reflection holography, including PFG-03C, is shrinkage of the emulsion. For reflection holograms, minute shrinkage of the emulsion after development can alter the observed colors of the finished hologram. That’s because the shrinkage changes the distance between the Bragg planes, and thus the wavelength that influences the color observed. For more detail on Bragg planes, see the pamphlet HOLOGRAPHY by Tung H. Jeong.
Incidentally, color transmission holograms are not affected by shrinkage, and thus can be developed using JD-4 or JD-2 alone for the most part. The drawback, or course, is that color transmission holograms require different color lasers to view the hologram in color.
For color reflection holograms, there are two practical ways to deal with shrinkage. The first, and easier way, is to reverse the shrinkage in effort to restore the intended color. The second and more complex, but more effective, way is to prevent the shrinkage in the first place so the intended colors are captured.
METHOD 1 (Reverse Shrinkage)
Easier method but holograms may not turn out as bright, and the colors may slightly shift, e.g. Red could become slightly orange.
- Process with JD-2 or JD-4 developer kit.
- Afterwards, soak the emulsion in a weak solution of triethanolamine (commonly called TEA), which discussed in detail in Graham Saxby's book PRACTICAL HOLOGRAPHY, 3rd edition. This swells the emulsion (thus reversing the original shrinkage). TEA is an oil that mixes with water to keep the emulsion swelled up. TEA can be purchased from Fisher Scientific International.
METHOD 2 (Prevent Shrinkage)
More complex method requiring use toxic formaldehyde and specially prepared bleach. However, holograms will turn out bright with significantly reduced color shifting.
- After exposure, treat with formaldehyde to harden emulsion before development. Formaldehyde can be purchased from Fisher Scientific International.
- Develop with JD-2.
- Prepare a bleach solution that uses Amidol. Details can be found in th article by Hans Bjelkhagen, Tung H. Jeong, and Dalibor Vikicevic, “Color Reflection Holograms Recorded in a Panachromatic Ultra-high Resolution Single Layer Silver Halide Emulsion” (The Society of Imaging Science and Technology, 1996, pages 134-142).
