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Neutral Gray Filter Glass is an optical filter material with uniform gray density that uniformly reduces the intensity of transmitted light without changing the color or color temperature of the light. It is widely used in photography, videography, laser systems, and optical experiments to control exposure and prevent overexposure or excessive light intensity. Neutral gray filter glass effectively reduces strong light interference and improves the accuracy of shooting or experiments, making it suitable for applications requiring precise light control.
A. Characteristics of Neutral Dark-Tinted Glass
| Number | Thickness(mm) | A[2856k] | D65 | Chemical stability | ND | α×10-7(/℃) | Tg(℃) | Ts(℃) | S | |||||
| x | y | Y | x | y | Y | DA | DW | |||||||
| ZAB00 | 0.5 | 5 | 3 | 1.527 | 65 | 469 | 582 | 2.46 | ||||||
| ZAB02 | 1 | 5 | 3 | 1.527 | 65 | 469 | 582 | 2.41 | ||||||
| ZAB2 | 2 | 0.447 | 0.396 | 1.1 | 0.306 | 0.315 | 1 | 5 | 3 | 1.527 | 65 | 469 | 582 | 2.43 |
| ZAB5 | 2 | 5 | 4 | 1.527 | 65 | 469 | 582 | 2.42 | ||||||
| ZAB10 | 2 | 0.434 | 0.402 | 9 | 0.297 | 0.314 | 8.9 | 1 | 3 | 1.527 | 65 | 469 | 582 | 2.52 |
Technical Specifications for Neutral Tinted Glass
| Number | Thickness(mm) | U(Mired) | |
| Standard | Tolerance | ||
| ZAB00 | 0.5 | 2 | 1.0~4.0 |
| ZAB02 | 1 | 1.5 | 0.5~3.0 |
| ZAB2 | 2 | 2 | 1.0~3.0 |
| ZAB5 | 2 | 5 | 1.0~9.0 |
| ZAB10 | 2 | 10 | 6.0~15.0 |
Neutral dark tinted glass: bubble, streak, stress-type grades
| Number | Bubble | Stripes | Stress |
| ZAB00 | C-B | 4 | 3 |
| ZAB02 | C-B | 4 | 3 |
| ZAB2 | C-B | 4 | 3 |
| ZAB5 | C-B | 4 | 3 |
| ZAB10 | C-B | 4 | 3 |

B. Characteristics of Neutral Dark-Tinted Glass
| Number | Thickness(mm) | A[2856k] | D65 | Chemical stability | ND | α×10-7(/℃) | Tg(℃) | Ts(℃) | S | |||||
| x | y | Y | x | y | Y | DA | DW | |||||||
| ZAB25 | 2 | 0.442 | 0.408 | 25.7 | 0.308 | 0.327 | 25.4 | 5 | 3 | 1.502 | 65 | 469 | 582 | 2.41 |
| ZAB30 | 2 | 1 | 3 | 1.523 | 65 | 469 | 582 | 2.52 | ||||||
| ZAB50 | 2 | 0.444 | 0.408 | 45.7 | 0.31 | 0.329 | 45 | 5 | 3 | 1.502 | 65 | 469 | 582 | 2.41 |
| ZAB65 | 2 | 1 | 3 | 1.521 | 65 | 469 | 582 | 2.52 | ||||||
| ZAB70 | 2 | 0.499 | 0.41 | 70.2 | 0.316 | 0.385 | 68.7 | 5 | 3 | 1.502 | 65 | 469 | 582 | 2.41 |
Technical Specifications for Neutral Tinted Glass
| Number | Thickness(mm) | U(Mired) | QZ(%) | |
| Standard | Tolerance | |||
| ZAB25 | 2 | 25 | 18.0~32.0 | ≤6.0 |
| ZAB30 | 2 | 30 | 23.0~37.0 | ≤10.0 |
| ZAB50 | 2 | 50 | 41.0~59.0 | ≤8.0 |
| ZAB65 | 2 | 65 | 58.0~72.0 | ≤6.0 |
| ZAB70 | 2 | 70 | 63.0~77.0 | ≤7.0 |
Neutral dark tinted glass: bubble, streak, and stress-related categories
| Number | Bubble | Stripes | Stress |
| ZAB25 | C - B | 4 | 3 |
| ZAB30 | C - B | 4 | 3 |
| ZAB50 | C - B | 3C | 3 |
| ZAB65 | C - B | 3C | 3 |
| ZAB70 | C - B | 3C | z |

As a leading manufacturer in the Yangtze River Delta Integrated Demonstration Zone (Jiashan, Zhejiang), Jiangnan Outdoor has been awarded "National High-Tech Enterprise" and "Jiaxing Green Factory" titles, with full certifications in ISO 9001:2015, ISO 14001:2015, and ISO 45001:2018 international standards.
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