Ultra fine grain emulsion (red)

This material is designed for reflection hologram recording using CW radiation in the red spectral range (633nm - HeNe laser and 647nm - Krypton laser). This emulsion has forth times smaller grains than VRP-M and PFG-01 (figure1). Therefore, it is hundredths time less sensitive than fine grain emulsions VRP-M and PFG-01. Ultra fine grain emulsions provide a bit more clear image than fine grain ones, but are very soft and are not recommended for hobbyists and beginners due to quite difficult processing and shorter life time. The Characteristic curve is shown on Fig.2. Peak emulsion sensitivity is around 1.5-2mJ/cm2. The spectral sensitivity curve of the material is shown in Fig.3. Recommended processing is given in table1, recommended chemistry - in table2.

Figure 1-3

Recommended processing for PFG-03M

Exposure: 1.5 - 2.0 mJ/cm2
Development/Hardening  SM-6 + Formaldehyde 37% (10 ml to 1 liter of developer) , 2 min.
Wash Water, 2 min.
Bleach PBU-Amidol   5 min.
Wash Water 5 min.
Drying in Alcohol bath 50% Isoprophyl alcohol 4min
Drying Slow Air

Recommended Chemistry for PFG-03M

SM-6 Developer PBU-Amidol Bleach
Sodium Hydroxide 12.0g Potassium Persulphate 10.0g
Methyl Phenidone 6.0g Citric Acid 50.0g
Ascorbic Acid 18g Cupric Bromide 1.0g
Sodium Phosphate (dibasic) 28.4g Potassium Bromide 20.0g
if 12H2O 71.6g Amidol 1.0g
Water to 1.0L Water to 1.0L

Chemical Formulas

Title Chemical Formula
SM-6 Sodium Hydroxide NaOH
Phenidone C6H5-C3H5N2O
Sodium Phosphate (dibasic) Na2HPO4
PBU-Amidol Potassium Persulphate K2S2O8
Citric Acid HOC(COOH)(CH2COOH)2
Cupric Bromide CuBr2
Potassium Bromide KBr
Amidol (NH2)2C6H3OH-2HCl