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To 29 October 2006 -

Andrea Rossovich 1880 (to the registry office recorded like "galvanoplastico" - NT Ts 12.3.1840, mt. Ts 24.5.1897)

EXECUTIVE TECHNIQUE draft very 250 reperti obtained with the elettroplating methods (galvanoplasty and galvanostegia).

The archives searches have carried to the single recovery of little lines written up in the 1884 from dottor the Carl de Marchesetti, to the age director of the Museum, with which it annotated the acquisition of the collection, appreciating some the "mirabile invoice", but defining it "of insufficient scientific interest", interest that instead is matured at a distance of 120 years, for the possibility of comparison between the marine fauna puts into effect them and that one of the age.

To the external observation pieces are introduced as you specify treads of the organisms, are executed in hollow shapes; the used material is branch, covered inner from one protecting black patina and externally from one silver layer. On some exemplary they are noticed particular reached to you in according to time by means of weldings or joints, like fins, antennas and legs, probably in order to simplify the realization of treads, eliminating the sottosquadra, espediente already widely used from the scultori since the antiquity.

OUTLINE REALIZZATIVO 1: realization of treads in chalk (external print or negative of exemplary) 2: galvanoplasty on treads (positive in branch) 3: silvering of the positive one in branch with galvanostegia

PRINCIPLES Of the GALVANOPLASTY the realizzativo process was to the age something absolutely new and technologically advanced; they go back to the half of the ight hundred first applications of the elettrolitici principles in order to cover an object with one metallic patina (galvanostegia), and later on in order to realize metallic objects from denied or matrices to you (galvanoplasty).

Still today the applications of elettrolitiche techniques are innumerable, remained substantially invariate from a century and means: in order to only cite the more famous examples, you to the mirrors is gone from the printed circults, from chromizings to the gildings, the cliché from press to prostheses of ortodonzia.

In extreme synthesis the principle of operation of electrolysis - from which they derive the galvanostegia and the galvanoplasty - are following: it knows them metallic in watery solution are divided in Ionian, that is in atoms equips you of loads electrical worker (elettrolitica dissosciation), in degree therefore to move towards of the electrodes connects you to one battery; such atom migration, for a series of phenomena chemical-physicists, determines near the positive pole one reduction and the pole negative a warehouse. Placing to the pole negative an object of material conductor, or rendered such, the described phenomenon over can be employed in order to realize metallic coverings or in order to create objects from a matrix or treads.

NOTES On the PREPARATION pieces are in discreet conditions generate them of conservation; some turn out light damage to you from hit that they have caused modest distortions of the metal; some detail has gone lost (parts finishes them of fins, chele or antennas and some support, sure already lacking to the moment of the ritrovamento).

The thin silver covering partially is oxidized and on some superficial small consunto nearly totally. For the preparation it has been followed the principle of the minimal participation, in order not to alter the originality of the collection and in order not to interfere with eventual successive readings; us one is therefore limits you to a pulizia to paint-brush with simple water, continuation from the drying with compressor to air to low pressure, maintaining in place the numbers originates glue them to you.

Many pieces reproduce exemplary of the same species; some of these doppioni have been brought back to the original lucentezza by means of immersion in bath reagent for the removal of oxides from silver. Finally little pieces, realize to you in more parts to joint, have been simply rimontati, without adhesive use.

On some reperti they have been you execute scientific surveyings and I affixed test to you, that which have comfermato the presence of metals the copper and the silver. Such specialistiche searches have been cured from one specialist in archeometallurgia, prof. the Alessandra Giulia Mair of the Athenaeum of Udine.

in Marine Aquario Timetable: 9.00 - 19,00 entire 3 euro, reduced 2 euro