After we take some experiment research in many angles and found this oil is release layer which formationed by the release agent on the surface of the model when injection molding, its purpose was to devided them apart from each other.Its second function is consider to quality,style,possible of cleaning and coating.At the last,we need the methods to solve this problem.Before doing heat transfer printing,,we can wash off the release agent by treating agent,after repeating tests by solvents,we found that it has a good effect after deal by thinner.So Aeon Printing Materials Co.,Ltd got the knowledge of transfer can also helped by other medio after this event.