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May I borrow your red ink pad?
Literal
Red-ink-pad [object-を] humbly-borrow [even-ても] is-it-acceptable [polite-ですか]?
A polite request in a business or official setting. 朱肉 (しゅにく, 'red ink pad') is the vermillion ink pad used with 判子/印鑑 (personal seals) — essential in Japanese bureaucracy and business for stamping documents instead of signing. お借りする is the humble form (お~する) of 借りる. ~てもよろしいですか is the keigo permission pattern: 'would it be acceptable if I...?' More formal than ~てもいいですか.