Acktar Black coatings are excellent performers where a combination of high absorptance and high tolerance of laser energy is required.
The Laser Induced Damage Threshold (LIDT) of a coating cannot be stated in general but depends upon a number of factors – wave length, pulse width, pulse rate, laser waveform, etc.
In the case of Acktar coatings – which absorb light – the LIDT depends also upon the ability of the substrate to quickly disperse the absorbed thermal energy.
Acktar coatings have been tested under a variety of test conditions and the results presented show that Acktar Black Coatings exhibit very impressive LIDT values under a broad variety of conditions and constitute an excellent choice where a combination of high absorptance and high tolerance of laser energy is required.
Summary of Presently Test Data
| Wavelength | Coating | Substrate | J/sqcm | |
| 1-on-1 | 10-on-1 | |||
| EUV (~13nm) | Magic Black | > 3.5 | below 3.5 | |
| Wavelength | Coating | Substrate | kW/sqcm (peak power) | J/sqcm |
| 193 nm pulsed (10ns) |
Magic Black | SS – 0.65 mm | 9,600 | 0.096 |
| Fractal Black | SS – 0.65 mm | 8,100 | 0.081 | |
| Al – 3 mm | 8,600 | 0.086 |
| Wavelength | Coating | Substrate | W/sqcm | J/sqcm | |
| 30 sec | 60 sec | ||||
| 532 nm quasi CW (1μs; 20kHz) |
Magic Black | SS – 0.65 mm | 1,500 | 780 | |
| Fractal Black | SS – 0.65 mm | 900 | 560 | ||
| Al – 3 mm | exceeds 8000 (test limit) | ||||
| 532 nm (7.2ns; 100 Hz) |
Metal Velvet | Aluminum foil | 0.144 (1-on-1) 0.132 (1000-on-1) |
||
| Wavelength | Coating | Substrate | W/sqcm | J/sqcm | |
| 30 sec | 60 sec | ||||
| 1064 nm quasi CW(1μs; 20kHz) |
Magic Black | SS – 0.65 mm | 600 | 500 | |
| Fractal Black | SS – 0.65 mm | 400 | 400 | ||
| Al – 3 mm | exceeds 800 (test limit) | ||||
| 1064 nm (10.2ns; 100 Hz) |
Metal Velvet | Aluminum foil | 0.277 (1-on-1) 0.221 (1000-on-1) |
||
| Wavelength | Coating | Substrate | W/sqcm |
| 10,600 nm CW | Fractal Black | exceeds 3,000 (test limit) |