Kodak manufactures nuclear emulsion type NTB for use in the detection of radioactively labelled samples eg. in situ hybridisation.
This emulsion is designed to aid microscopic examination of individual silver grains in the developed emulsion layer, and to confirm the passage of ionising radiation. This emulsion has a high silver to gelatin ratio, very fine silver grains, and offers a low level of background fog.
Emulsions must be stored at 4 - 5°C without freezing, since they deteriorate at temperatures appreciably above this. For this reason, these emulsions are not normally stocked, but can be obtained on request.