Discussion
Assertion (A): A body cannot be made both easy to fire and highly resistant to deformation at temperature.
Reason (R): The flux that lowers the firing temperature is the same thing that softens the body.
Answer: C
Correct answer: Both A and R are true, and R is the correct explanation of A
Both are true and the reason gives the conflict. Fluxes work by forming a liquid phase at temperature, and it is that liquid which fills the pores and vitrifies the body - and equally that liquid which lets it sag. Lowering the firing temperature therefore lowers the deformation temperature with it, and the two goals cannot be pursued independently.
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