CineStill BwXX is a high speed, classic black & white film emulsion, with an EI of 250 under daylight and 200 under tungsten lighting. Recommended development in Kodak D-96 developer, but is compatible with D-76, HC110 and all other black and white film developers.

• Panchromatic B&W Negative Film
• ISO 250/250 in Standard Process
• Fine Grain and High Sharpness
• Classic Emulsion, Subtle Tonality
• Scratch-Resistant Acetate Film Base
• Non DX-Coded 135 Cartridge

References

https://www.thephoblographer.com/2018/04/17/film-emulsion-review-cinestill-bwxx-400-black-and-white-film-35mm/ 

https://www.digidirect.com.au/accessories/film/cinestill_bwxx_double-x_black_and_white_negative_film_35mm_roll_film_36_exposures?gclid=EAIaIQobChMI5dHk4ueb3gIVzg0rCh38qwvLEAQYASABEgJe2PD_BwE

Image Credits

Cine Still Film