Final answer:
Intaglio printing was popular due to its unique qualities, intricate designs, and hand-crafted authenticity.
Explanation:
Intaglio printing was commonly used despite its difficulty due to the unique qualities it offered. The process of incising channels into a metal plate to create an image allowed for intricate and detailed designs not easily achievable through other printing methods. Additionally, intaglio prints were highly valued for their authenticity and hand-crafted quality.
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