Describe
It’s kind of fluorescent toner, it’s looked no any different from common toner, such as blue color, black color, yellow color, but under UV light, blue color can change to red color, black color can change to red color, according to the color under UV light, there are four kinds,
 
Type
T3-100   colorful toner (such as yello,blue,black,…), under UV light, can give out yellow color.
T3-200  colorful toner (such as yello,blue,black,…),  under UV light, can give out green color.
T3-300   colorful toner (such as yello,blue,black,…), under UV light, can give out red color.
T3-400   colorful toner (such as yello,blue,black,…), under UV light,can give out blue color.

 The way to use the change color is same as common toner, and the toner can be suit for any kind of printer.
“black change to red toner, the toner is black ,and no any different
From common toner, but under UV light, the toner will appear red.