Printing apparatus and control method of printing apparatus

A control method of a printing apparatus,

• the printing apparatus comprising:
• a light source configured to emit light to a first surface of a printing sheet;
• a sensor configured to detect the light reflected from the printing sheet;
• a reflection member located at a position facing the sensor and coming into contact with a second surface opposite to the first surface of the printing sheet, the first surface receiving the light at the time of the printing sheet receiving the light;
• and
• a conveyance mechanism that conveys the printing sheet, wherein
• a first area and a second area whose reflectance is lower than that of the first area are included in the reflection member,
• the control method comprising:
• determining a type of the printing sheet based on a feature amount obtained by the sensor detecting the light from a plurality of positions of the printing sheet, wherein
• a position corresponding to the first area and a position corresponding to the second area are included in the plurality of positions.