Samsung SCX-4720F - GNU GENERAL PUBLIC LICENSE (Apple OS Exception)

Reference Information
Samsung Electronics
Service Manual
2-3
2.3 The Sample Pattern for the Test
The sample pattern shown in below is the standard pattern used in the factory.
The life of the toner cartridge and the printing speed are measured using the pattern shown below.
(The image is 70% of the actual A4 size).
2.3.1 A4 5% Pattern