Conservation-restoration works on ceramic dolia from the site of Krvavići-Boškina

U ovom radu bit će prezentirani konzervatorsko-restauratorski radovi na dolijama koje potječu iz I.- II. stoljeća, a pronađene su tijekom istraživanja djelatnika Hrvatskog restauratorskog zavoda na lokalitetu Krvavići-Boškina. Dolije su keramičke posude velikih dimenzija koje se najčešće vežu uz gospodarske objekte. Služile su za skladištenje hrane i tekućina, a upotrebljavale su se još od helenističkog razdoblja. Te su posude izrađivane na nekoliko načina. Treba istaknuti rad uz pomoć drvenog kalupa te izradu uz pomoć cjevasto oblikovanih komada gline koji su slagani jedan na drugi. Konzervatorsko-restauratorski radovi na tim predmetima bili su zahtjevan projekt, iako predmeti nisu u cijelosti rekonstruirani. Nakon razvrstavanja, fragmenti su mehanički očišćeni od naslaga zemlje i kalcitnih naslaga. Površinskom impregnacijom nije se postigao zadovoljavajući učinak stabilizacije keramičkih ulomaka, pa su zato svi fragmenti impregnirani u vakuumskoj komori, za što se koristila otopina polivinil-acetata u acetonu. Uslijedilo je spajanje fragmenata lijepljenjem uz pomoć armatura radi osiguravanja stabilnosti posude, te rekonstrukcija nedostajućih dijelova gipsom i na kraju toniranje gipsanih integracija. Budući da predmeti nisu rekonstruirani u svojim izvornim dimenzijama, idealne rekonstrukcije napravljene su na osnovi analogija sličnih posuda uz pomoć računalnih programa.The paper presents the conservation-restoration works on dolia, dating from the 1st-2nd c., which were discovered on the site of Krvavići-Boškina during explorations carried out by the staff of the Croatian Conservation Institute. Dolia are large earthenware containers, used mostly on farms. Their function was that of foodstuffs and liquid storage, and they had been in use since the Hellenistic period. Containers of this kind were produced in several ways, of note among which are manufacture with a wooden mould, and formation from tube-shaped pieces of clay that were placed on top of one another. The conservation and restoration of these items were very demanding, although the artefacts have not been fully reconstructed. First of all, the fragments were classified and mechanically cleaned of dirt and calcareous sediment. The surface impregnation did not result in a satisfactory stabilization of pottery shards, which is why all the shards were impregnated in a vacuum chamber, with a solution of polyvinyl acetate in acetone being used. Thereafter the shards were glued together with the assistance of reinforcements, aimed at securing the stability of the container, and the missing parts were reconstructed from gypsum, and finally toned. Since the dolia have not been reconstructed in their original dimensions, ideal reconstructions were made on the basis of analogies with similar containers, with the help of computer programs