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In den Fabriken wird zunächst Zinn in Form von Barren oder Blechen angeliefert. Die Handwerker schneiden, formen und giessen das Zinn in die gewünschten Formen. Es können verschiedene Techniken Anwendung finden, darunter das Walzen, Gießen oder das Treiben, bei dem das Zinn mit einem Hammer in die gewünschte Form gebracht wird. Diese Techniken erfordern viel Geschick und Präzision, um ein qualitativ hochwertiges Endprodukt zu garantieren.
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The factory process behind metal lunch boxes often involved a series of intricate steps. First, the raw materials were sourced and cut into the appropriate sizes. Next, the metal sheets underwent printing, where vibrant colors were applied to create eye-catching designs. The pieces were then shaped, bent, and fused together, creating a sturdy construction that could withstand the rigors of daily use. Finally, a protective coating was applied to guard against rust, ensuring these lunch boxes would endure for years.
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