標準號：BS ISO 6846-1995
中文標準名稱：攝影技術.黑白連續色調相紙.曬印用ISO感光度和ISO幅距的測定
英文標準名稱：Photography - Black and white continuous tone papers - Determination of ISO speed and ISO range for printing
標準類型：G81
發布日期：1995/12/15 12:00:00
實施日期：1995/12/15 12:00:00
中國標準分類號：G81
國際標準分類號：37.040.20
適用范圍：Pertains to all conventional silver-halide contact and enlarging papers used for continuous-tone or pictorial photography. The method is based on exposing and processing samples, performing density measurements from the resultant image to produce a sensitometric curve from which measurements are taken and used to determine ISO speed and ISO range values. Annexes A to C deal with the relationships between the paper range and the effective density range of the negative, log exposure range and contrast, and log exposure range and average gradient.