Blade

Before the years 75 – 77, when the razor blade rose to the honors of the general public by virtue of the PUNK Generation, the RAZOR BLADES already had a place, not only inside the barber's razors, but also in the designer's arsenal, with the task of correcting and/or modifying the precious tables drawn on semi-transparent glossy paper.
Unlike the erasers for India ink, which were introduced in more recent times, a razor blade used with skill left no trace on the paper support. Naturally, it was necessary to use that dose of manual craftsmanship that characterized the intellectual profession of the Architect in illo tempore.
For this purpose, it was essential to go over the “razor-edged” line with the back of the nail, and then delicately around it with a pencil eraser. This closed the pores of the paper and made the ink pen line only slightly heavier than the other parts.
Louis Zambetti

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