Brand new compatible Black Laser Toner (DRUM UNIT DR450 DR-420 for Printers M...

Compatible with DR420 Drum Unit. Cool Toner provides replacement printing supplies with the same quality as OEM products with big savings.

Q&A

Q: How should I choose a right toner cartridge with good quality?

A: First, you have to find out the printer model you use. Generally you can see the model number on the printer surface or the package.

Second, you need to know the basic parameters for a cartridge as below.

*Page Yield
STMC or ISO 19752 are usually employed to evaluate page yields of toner cartridges

*Image Density
This refers to blackness and color degree for cartridges, which will make sure your print outs clearly enough. Ideal Density is 1.3-1.5.

*Background
Background refers to the cleanness of the blank space on your print outs. More lower on this parameter, better on the printing quality.

*Fusing
Fusing refers to the firmness of the toner adhered on the paper. If the toner can be easily erased with your finger from the paper, the fusing is not good.

Q. How does Cool Toner make sure their products can meet above parameters?

A: Firstly, Cool Toner cartridges are certified with ISO9001, ISO14001, ROHS, STMC and CE, MSDS.
Secondly, all of the products have passed strict testing as below.

*Extensive Environmental Test
Low-temperature storage test: - 20 degrees centigrade to - 30 degrees centigrade, stored for 40 days
High temperature storage test: 50 degrees centigrade, stored for 72H

*Aging Test
Aging Test of raw materials in high-temperature 50 degrees centigrade and stored for 30 days

*Advanced equipment
X-Rite tester.
Environmental Chamber
Low Temperature Storage Chamber
High Temperature Storage Chamber