PFG-04 Dichromated Gelatin Holographic Plates

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. We do not currently have an estimated time when we may be able to have these holographic plates back in stock. Thank you for your understanding and continued support.

Dichromated Gelatin for High Diffraction Efficiency

A grainless emulsion, the PFG-04 dichromated gelatin recording material has extremely high resolving power and a diffraction efficiency of >75%. It has sensitivity that reaches 100mJ/cm² in the blue spectrum range and 250mJ/cm² in the green spectrum. The PFG-04 is designed for making Denisyuk-type reflection holograms using CW laser radiation (488nm, 514nm - Argon laser). Available in only in plate format.

Characteristic	Specification
Spectral sensitivty	415-514nm
Average grain size	Grainless
Resolving power	High (grainless)
Exposure peak sensitivity	100µJ/cm2 (blue), 250µJ/cm2 (green)
Emulsion thickness	23-27µ
Glass thickness	2.4mm
Diffraction efficiency	75%
Processing	Details

See spectral sensitivity curves

How to Process

Unlike silver halide materials, the PFG-04 dichromated gelatin emulsion requires special processing techniques. The PFG-04 cannot be processed using the JD developer kits.

There are various methods for processing PFG-04, one of such techniques is described. For additional details, see Hans Bjelkhagan’s book SILVER HALIDE MATERIALS FOR HOLOGRAPHY AND THEIR PROCESSING (Springer-Verlag, Second Ed. 1996).

1. Thermal Hardening after exposure (100°C) - Depending on the layer freshness.
2. Cooling to Room temperature.
3. Bathing in running filtered water - 3mins.
4. Bathing in 50% Isopropyl Alcohol solution for 2 - 3 mins.
5. Bathing in 75% Isopropyl Alcohol solution for 2 - 3 mins.
6. Bathing in 100% Isopropyl Alcohol solution for 2 - 3 mins.
7. Drying in a desiccator. (100°C) for 60 mins.
8. Emulsion layer preservation using optical anhydrous adhesive and protective glass.

The processing solution temperatures must not exceed 20°C for fresh layers. If your hologram appears "milky", decrease the processing solution temperature or prolong the thermal hardening period.