| 摘要 |
<p>PURPOSE: To make transmission of microwaves controllable by having a covering film painted with printing ink containing aluminum and/or other metal or their alloy, and varying distribution per volume of the metal or alloy with heat to be applied to individual area/portion of a meal. CONSTITUTION: A circular meal tray 1 has a sealing rim 7 at its outer edge and a covering film 8 has been sealed with the rim 7. This covering film 8 is printed at segments 9 through 11 with printing ink containing aluminum particles. The segment 9 contains about twice the amount of aluminum in comparison with other two sections.</p> |
