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Our irreversible MWAC, coated on a transparent for microwaves object has response time for permanent color transition between 10 - 12 seconds under standard conditions:
Magnetron output power: 1.0 kW
Ambient temperature: 77 F (25 C)
Cavity volume: 1.0 ft³ (28 L)

Irreversible MWAC coated on a microwave absorbent material has considerably longer response time.