Discussion
Assertion (A): Biscuit ware is fired to a lower temperature than the final glost firing.
Reason (R): It must remain porous enough to take up glaze by absorption.
Answer: B
Correct answer: Both A and R are true, and R is the correct explanation of A
Both are true and the reason gives the purpose. Biscuit firing is deliberately stopped short of vitrification so the ware remains porous; the glaze slip is then applied and the porous body sucks the water out of it, leaving an even coating that dries and holds. A fully vitrified body would not absorb, and the glaze would run or fall off. The glost firing then goes higher and matures both glaze and body.
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