Quote Originally Posted by holmburgers View Post
However, Struan's post puts us back in contradiction; saying that the reflector will strengthen the effect.
No, it won't. If it would, wouldn't then all interference filters and reflection holograms have such reflectors?
A reflector may severely weaken image contrast and add noise (reflections).

Quote Originally Posted by holmburgers View Post
Can the reflector remain for viewing or not? that is the question
It can't. All the Lippmann photos I've seen (made on AgX materials) reveal their color effect but on the emulsion side. That might be different though with high index modulation materials like DCG etc.