Discussion
Assertion (A): A dull glaze surface is not necessarily a matt glaze.
Reason (R): An underfired glossy glaze also appears dull without having crystallised at all.
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 distinction. A true matt glaze is dull because it has crystallised; an underfired glossy glaze is dull because it never melted properly and its surface is rough and pitted. They look similar and are quite different faults - the second is corrected by firing higher or longer, and treating it as a matt glaze would leave the ware porous and unsatisfactory.
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