Notice on transfer printing on glass mug

Notice on transfer printing on glass mug :
1. The picture(image) should be clear and distinguished, dark color is recommended.
2. The pressure should not be too high, being moderate.
3. Before transfer printing, please pre heat the surface of the mug.
4. The temperature of working place should not be too low for which may cause big contrast with the heating mug and then result in breakage.
5. Time&trouble shooting, the same as the plain ceramic mugs.