34.3 New Products - The leather never goes out of fashion

16/04/13

The leather never goes out of fashion  

Rather than a new product, this article from the Bulletin CTS has an old product, but hard to find, so much so that his return on the market represents a real novelty. We talk about the high quality leather for bookbinding and restoration.  

The conceria Enrico Gentili & Figli has a long tradition in the field of goat-sheep leather tanning and for generations, meets the same standards of workmanship of the leather, according to the dictates of a consolidated experience in a unique and specialized field such as the restoration and conservation of codes and ancient books of great value.

The company, founded in the second half of the 800, it has had in the past wide acclaim for the activity and in particular, it was awarded in 1922 of a gold medal and a diploma at the international exhibition of art, Commerce, Science and industry of Rome.  

The traditional leather work and roman parchment, for its peculiarity, it was also inserted in RAI documentary “IL LIBRO“ made at the head office in 1984.  

The high quality of the products has made it known to the "insiders" in the field of restoration and conservation of the ancient book not only in Italy, but also abroad. The tannery has provided with continuity over decades, leathers to prestigious institutions such as the most important archives, libraries and in the cabinets of restoration.


All leather products are made with a long process of craftsmanship on whole hides all of Italian origin, which are not subject to the procedure of splitting (1) and in particular grain leather (2).
The vegetable tannage process (3) on grain leathers, which follows the simple depilation of the fleece, carries the same to be unique and therefore different from the other, enhancing the grain and the light shade that nature has designed in the life of the animal. This process ensures that the restoration and conservation are made from materials with characteristics identical to the original ones and therefore also intended to have the same longevity.
 

The parchments, always full of skin are depilated and tanned with lime, pull on the rim in wood and are finished by hand with a knife to crescent.

The alum tanned leathers are also made of goat-sheep skins and are greatly appreciated for the internal bindings of manuscripts.

For the reasons described above, the leather guarantee outstanding durability combined with an aging that enhances the aesthetic appeal.

Being genuine grain leather, all leathers are of first quality, so the only change in the purchase price is determined by the so-called "maximum usable surface" in relation to the total size of the skin. 

Leather products are classified according to their surface; Please note that the unit of measurement used is the square foot (ft²) (4)   
Small size leather (up to 3.00 ft ²)

Medium size leather (from 3.00 to 5.50 ft ²)

Big size leather (from 5.50 to 8.00 ft ²)

Great extent leather (over 8.00 ft ²) 
 

The further classification (except parchment and alum tanned leather, all of 1st choice) is based on the percentage of the maximum usable surface (quadrant):
1st choice     (80% to 100%)

2nd choice     (50% to 80%)

 3rd choice    (< 50%)  

(1)
       Spilt procedure - Processing that is carried out with the splitting machine; the process serves to cut the entire leather in its section, thus reducing its thickness and strength.
(2)      
Grain leather - Leather that has preserved the original grain without any surface layer has been removed by sanding, withering or split.
(3)       Vegetable tanning – Process consisting in transforming the skin into leather by means of peel of plants (chestnut, mimosa etc) in water produce natural tanning saps.
(4)      
Square foot (ft²) - English unit of measurement is equivalent to 929.03 cm², it is used to measure the leather..




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