It is possible to record modern Lippmann photographs without using a mercury reflector. Instead the Fresnel reflection between the emulsion and air is sufficient, with the plate located in a special dark slide. This makes it much more practical (and safer) to record modern Lippmann photographs including large plates.
Chapter 2 in the Ultra-Relistic Imaging book is devoted to Lippmann photography with detailed information about old and modern Lippmann photography.
Lippmann photographic plate illuminated and observed in different ways:
a. Negative reflected image seen when illumination and observation are not perpendicular
b. Positive red image seen in transmitted illumination caused by colloidal silver particles
c. Colour reflected image seen when illumination and observation are perpendicular
1908 Nobel Physics Prize