ENGRAVING THE AL-IDRISI MAP IN SILVER

Madrid, 2019

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Where Al-Idrisi's map would have been engraved by hand, Factum Foundation's re-creation uses CNC milling machines to engrave the contours of cities and coastlines onto the silver surface. Far from representing a de-skilling of the engraving process, Factum Foundation's use of these machines pushes them to limits usually thought impossible: where CNC routing is often regarded as an imprecise method of rematerialising data due to the 'noise' left by the head of the drill, Factum is able to create remarkable precise reproductions by reworking the same surface multiple times in finer and finer detail, in materials ranging from wood to resin to alabaster.

Factum's CNC milling experts were able to translate the vectorised world map (shown below) into commands to the milling machine. The map was engraved in eight parts, with each plate measuring 500x1000mm. The engraving of each took 48 hours, and was performed using a spring-loaded tool, which is able to cut without rotating and applies a similar pressure to the thin plate (0.3mm thick) to that made during the hand-engraving process. The plates were fixed to the work surface using a contact glue which allows a degree of movement, allowing them to deform in response to the pressure of the engraving tool.

Once routed, the plates were cut and fitted together with the help of a silversmith.

The fully vectorised world map © Factum Foundation

Vectorial file showing the same section of the Mediterranean, with Sicily towards the top of the map and Italy underneath © Factum Foundation

Bitmap file showing a section of the Mediterranean, with Sicily towards the top of the map and Italy underneath © Factum Foundation

Vectorial file © Factum Foundation

Bitmap file © Factum Foundation

Milling test in copper © Oak Taylor Smith for Factum Foundation

Milling tests © Oak Taylor Smith for Factum Foundation

Milling test in copper © Oak Taylor Smith for Factum Foundation

Milling in silver © Oak Taylor Smith for Factum Foundation

Milling in silver © Oak Taylor Smith for Factum Foundation

Milling in silver © Oak Taylor Smith for Factum Foundation

The map milled onto silver © Oak Taylor Smith for Factum Foundation

The map milled onto silver © Oak Taylor Smith for Factum Foundation

Silver and copper milling © Otto Lowe for Factum Foundation

Section of the silver map © Oak Taylor Smith for Factum Foundation

Members of the Factum Arte team fixing the silver plates onto a support © Francesco Cigognetti for Factum Foundation

Silvia Álvarez and Javier Barreno fixing the silver plates onto a support © Francesco Cigognetti for Factum Foundation

Silvia Álvarez and Javier Barreno fixing the silver plates onto a support © Francesco Cigognetti for Factum Foundation

Silvia Álvarez fixing the silver plates onto a support © Francesco Cigognetti for Factum Foundation

The finished map in Factum Arte's workshops © Oak Taylor Smith for Factum Foundation

The finished world-map © Oak Taylor Smith for Factum Foundation

The map was exhibited at Daniel Crouch Rare Books before travelling to Oxford for display in the exhibition 'Talking Maps' at the Bodleian Library (5th July 2019-8th March 2020).

 

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Factum team: Francesco Cigognetti, Francisco Regalado Abascal, Javier Barreno, Silvia Álvarez López-Doriga, Eduardo López Rodriguez, and Carlos Alonso Salamanca.

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