The purpose of NCT (Nezam’s Colors Technique) is to introduce a systematic approach for finding the possible spectrum of colors on stainless steel. The vission is to use this systematic colors gradient to mark colorful photos on stainless steel.
For this, NCT focuses on the basics of the Steel Temper Color phenomenon. Surface of the steel reflects a range of colors when it reaches a certain temperature. As an example, check on this piece of steel (Tempering Metallurgy, Wikipedia) heated up on the right side:
Tempering colors are classified by their corresponding temperatures (from above link):
- Faint-yellow – 176 °C (349 °F)
- Light-straw – 205 °C (401 °F)
- Dark-straw – 226 °C (439 °F)
- Brown – 260 °C (500 °F)
- Purple – 282 °C (540 °F)
- Dark blue – 310 °C (590 °F)
- Light blue – 337 °C (639 °F)
- Grey-blue – 371 °C (700 °F)
What NCT introduces is to get this colors which seems to have an almost linear progress against temperature, by linear increase of power. Such a linear increase of power can be tested by Fiber (and or MOPA) lasers with a ribbon of 0 to 100% shades of grey in greyscale mode. Where the intensity of grey defines the intensity of power delivered to steel, it will expectedly result in producing the spectrum of colors.
