Shanghai GP3 100 is a medium-speed, panchromatic black-and-white negative film manufactured in China. It features a traditional, silver-rich emulsion known for distinct contrast, sharp details, and a unique aesthetic. Many shooters prefer rating it at ISO 50–100 for optimal shadow retention.
Film Type: Panchromatic black-and-white negative film
Sensitivity: Nominal ISO 100/21° (often tested closer to ISO 50–80 for richer shadow detail)
Grain & Contrast: Controlled yet prominent grain structure with high acutance and high contrast
Safelight: Can be handled/processed under a deep red safelight
Chemistry: Compatible with standard black-and-white developers (such as D-76, HC-110, and Rodinal)
