At present, there are Huaguang Brand Films produced by the second film factory of Lekai Group, Tianjin Sanhuan Brand Films produced by Tianjin Evergrande Photographic Materials Company and Shanghai Brand Films produced by Shanghai Sensitive Materials Factory. The foreign films are mainly AGFA and KONICA. Fuji and other brands. This article will select three domestic and foreign laser photo film for performance comparison. First, the domestic laser photo film factory recommended performance Laser photo-discharge film and other photosensitive materials, photographic performance mainly refers to the fog density, gamma, sensitivity and the highest density. Due to the differences in the test methods of the plants, these recommended performances are for reference only (see Table 1). Table 1 Recommended Performance of Domestic Laser Photographic Tablets 1. Photographic performance test In order to compare the performance of several laser photolithography films at home and abroad, we used the following conditions to test the photographic performance of the three films. The processing technology is shown in Table 2. Exposure conditions: color temperature 2859°K Color filter: Kodak Leiden 29 Exposure time: 1/50 second Table 2 Processing technology Figure 1 Characteristic Curves of Three Films Table 3 Measured photographic performance of several laser photolithography films Stainless Steel Small Steamer,Metal Vegetable Steamer,Stainless Steel Vegetable Steamer,Steel Steamer Jiangmen Junerte Stainless Steel Kitchenware Co.,Ltd , https://www.jmjetkitchenware.com
Second, several domestic and foreign laser photo film performance test
The photographic properties of the three films measured by the above method are shown in Table 3. Their characteristic curves are shown in Figure 1. 
1 The photographic performance of Huaguang Brand and Shanghai Brand is basically the same, while the sensitivity of Shanghai Brand is fast. This is beneficial to the user. According to the concept of film sensitivity, the faster the sensitivity, the less exposure is required to produce the same density. Under our testing conditions, the Shanghai brand can reduce the exposure by 70% compared to the Huaguang brand, while the Fujifilm brand has 2 times more exposure than the Shanghai film.
Film type \ camera performance
Fog density Do
Contrast coefficient r
Sensitivity s
The highest density Dmax
Huaguang LP6328II
≤0.08
≥5.0
≥0.8
≥4.0
Shanghai Brand HN6328II
≤0.10
≥5.0
>7.0
≥4.0
Tianjin Sanhuan LP6328A
≤0.08
≥5.0
16-20
≥4.0
Processing program
Time min
Temperature °C
Note
development
5
20±1
D-11
fixing
10
Normal temperature
F-5
Washing
5
Normal temperature
Flowing water
dry
/
50
drying
Film type \ camera performance
Fog density Do
Contrast coefficient r
Sensitivity s
The highest density Dmax
Huaguang LP6328II
0.07
5.8
9
>4.0
Fuji HSR
0.07
6.5
3.2
3.87
Shanghai Brand HN6328II
0.06
5.9
13
>4.0