The Datamax O'Neil Apex 4 is a portable direct thermal printer so the thermal transfer materials would not be recommended. Since the printer has a maximum core size of 0.4" and a maximum outer diameter of 2", it would not be considered compatible with our roll products. At this time we do not offered colored materials for thermal rolls. We do, however, offer colored sheet materials at the link below. https://www.onlinelabels.com/materials