Using industrial radiographic film as the main material, and undergoing exposure and darkroom processing, prepare density film standard materials for calibration and verification of diffuse transmission visual densitometers

Satisfying the prescribed parameters of standard density sheets in relevant regulations, it can be widely used in the calibration and verification of diffuse transmission visual density meters.

Purpose and characteristics:

Each set of density sheets has been calibrated by a national standard density device:

The total uncertainty is:0.01（D ≤2.0；k=2） 0.015（D ≤4.0；k=2）

Specification:
shareLevel 21, with each level being 0.2

The uniformity is 0.005, （D ≤2.0）0.01,（D ≤4.0）

Density range 0.05-4.0