| abstract |
[PROBLEMS] Plasma processing having a discoloration layer that improves heat resistance, which does not discolor the discoloration layer even when overheating at a maximum of 170 DEG C due to a deficiency in the plasma processing apparatus due to insufficient or insufficient supply of the plasma generating gas A detection indicator and a plasma processing detection ink composition for forming the color shift layer. [MEANS FOR SOLVING PROBLEMS] An ink composition for a plasma processing detection ink containing a colorant and a binder resin, wherein the binder resin contains a phenol resin, and a plasma processing detection indicator using the ink composition. |