What is the fine-grained topic of the following text: 3 Using Roland specified media, loaded correctly, temperature: 25 ºC (77ºF), humidity: 50 %RH, all pinch rollers are used, 25 mm or more for both right and left margins and 35 mm or more front margin, excluding expansion or contraction of the media. Only return the topic.
Roland specified media usage conditions and requirements.