Speaking of dichromated gelatin, one thing you might try before switching to another developer would be a "DCG-like" approach: put your already exposed/developed plate into a cold water bath for five minutes or so. Then you insert it into an 50% alcohol (isopropanol, ethanol or methanol) solution for two minutes. Then put it into a 100% alcohol bath for another two minutes. When you remove the plate you'd apply a warm air stream (hairdryer etc.) to dry it without causing condensation defects. Let me know if this shifts the reonstructing colors towards longer wavelengths.
Originally Posted by Hologram