Decorative tiles between Brazil and Europe: the case of the Santa Catharina factory

Abstract It was in the first decade of the twentieth century that the first white china Factory was implemented in Brazil. Fruit of the association between the Sao Paulo Aristocracy and the Italian Romeo Ranzini, this factory was responsible for producing significant amounts of crockery in industrial moulds in sao Paulo, Brazil. It was also the first factory to produce decorative tiles that would be part of the architecture of the public buildings built between 1919 and 1922 in Commemoration of the Centennial of the Brazilian Independence. Known as The Santa Catharina Factory, this factory was inaugurated in 1913 with the participation of Italian immigrants and German technologies for the development of its first manufacturing activities. As a result of a number of economic, political and social matters that started in the previous century in the city of Sao Paulo, The Santa Catharina factory played an important role in industrial development as regards the production of national white china and was used as a model for the construction of new ceramic factories in Sao Paulo. After acquired by Matarazzo industries in 1927, had closed their activities in 1937. This research is based on the identification and analysis of the first tiles produced in Brazil by the Santa Catharina Factory, which were part of the architectural decorations of the buildings built in Sao Paulo to the celebration of the Centennial of the Brazilian Independence. Designed by Victor Dubugras, The Largo da Memoria (located in the city of Sao Paulo) and the buildings located in the "Paths of the Sea" road marked the beginning of Brazilian industrialization and the emergence of Neocolonial Movement in architecture of Sao Paulo. Studies of the first national patterns of decorative tiles approach a subject poorly researched by experts in tiled studies in Brazil, although in this case these tiles have represented not only an important milestone in the national industrialization, but also have demarcated the significant changes in architectural and decorative practices in the country in the early twentieth century; RESUMÈ: C'est durant la premiere decennie du XXe siecle que la premiere usine de porcelaine blanche fut implant& au Bresil. Elle fut le fruit de l'association entre l'aristocratie de Sao Paulo et l'italien Romeo Ranzini. L'usine produisait une quantite signifiante de porcelaine sur le territoire industriel de Sao Paulo. Ce fut egalement la premiere usine a produire des carreaux decoratifs qui sont aujourd'hui visibles dans l'architecture des batiments publics construit entre 1919 et 1922, pour la commemoration du centenaire de l'independance bresilienne. Connue sous le nom de Santa Catharina, cette usine fut inaugure en 1912. Elle fut construite par des émigrés Italiens, et utilisa pour la technologie allemande pour so production. En tant que resultat d'un certain nombre de questions economiques, politiques et sociales qui ont &butes durant le siecle precedent dans la ville de Sao Paulo, l'usine Santa Catharina a joue un role important dans le developpement industriel de la production de porcelaine blanche nationale et a ete utilise comme modele pour la construction de nouvelles usines de ceramique a Sao Paulo. Apres avoir ete achete par l'industrie Matarazzo en 1927, elle cessa ses activites en 1937. Cette recherche est basee sur l'identification et l'analyse des premiers carreaux decoratifs fabriques au Bresil par l'usine Santa Catharina, qui etait une partie des decorations architecturales des batiments construits a Sao Paulo pour la celebration du centenaire de l'Independance Bresilienne. Connue par Victor Dubugras, le "Largo da Memoria" (situe dans la ville de Sao Paulo), et les batiments situes sur le "Path of the Sea", ont marque le debut de l'industrialisation bresilienne et l'emergence d'un mouvement neocolonialiste dans l'architecture de Sao Paolo. L'etude des premiers modeles nationaux de carreaux decoratifs est un sujet peut etudie par les experts bresiliens, bien qu'ils furent un jalon importante pour l'industrialisation nationale. Its ont egalement entrains des changements importants dans les pratiques architecturales, et decoratives au sein du pays au XXe siecle. Mots-cles: Ceramique - carreaux decoratifs — L'usine Santa Catharina, Bresil - Production de carreaux; RIASSUNTO: Nel primo decennio del Novecento vide luce la prima fabbrica di ceramica di porcellana in Brasile. Frutto dell'associazione tra l'aristocrazia Paulista e l'italiano Romeo Ranzini, questa fabbrica fu responsabile della produzione di notevoli quantita di ceramica di porcellana mediante stampi industriali nella citta di San Paolo, Brasile. Fu anche la prima fabbrica a produrre azulejos che avrebbero poi fatto parte dell'architettura degli edifici pubblici costruiti tra it 1919 ed it 1922, per la commemorazione del Centenario dell'indipendenza Brasiliana. Conosciuta come Fabbrica di Santa Catharina, questa fu inaugurata nel 1913, con la partecipazione di immigrati italiani e con l'impiego di tecnologie tedesche per lo sviluppo delle sue prime attivita produttive. Risultato di una serie di cambiamenti economici, politici e sociali, che ebbero inizio nel secolo precedente nella citta di San Paolo, la Fabbrica di Santa Catharina svolse un ruolo importante nello sviluppo industriale per quanto riguarda la produzione di ceramica di porcellana nazionale e fu adottata come modello per la costruzione di nuove fabbriche a San Paolo. Successivamente, fu acquisita dalle industrie Matarazzo nel 1927, vedendo poi chiudersi le sue attivita nel 1937. Questa ricerca si basa sull'identificazione e l'analisi dei primi azulejos prodotti in Brasile dalla Fabbrica di Santa Catharina che fecero parte delle decorazioni architettoniche degli edifici costruiti a San Paolo per la commemorazione del Centenario dell'indipendenza Brasiliana. Progettati da Victor Dubugras, it Largo da Mem(Via (situato nella citta di San Paolo) e gli edifici che si trovano nei Caminhos do Mar marcarono l'inizio dell'industrializzazione brasiliana e la nascita del Movimento Neocolonial dell'architettura Paulista. Gli studi dei primi modelli di azulejos nazionali affrontano un argomento poco studiato dagli esperti in azulejaria in Brasile, nonostante rappresentino un importante avvenimento dell'industrializzazione nazionale, ma segnano anche i cambiamenti di significative pratiche architettoniche e decorative nel Paese nel primo Novecento. Parole chiave: Ceramica - porcellana - La fabbrica di Santa Catharina - Produzione di ceramica .

Lacunae Infills for in Situ Treatment of Historic Glazed Tiles

Knowledge of current conservation materials and methods together with those adopted in the past is essential to aid research and improve or develop better conservation options. The infill and painting of tile lacunae are subjected to special requirements mainly when used in outdoor settings. A selection of the most commonly used materials was undertaken and performed based on inquiries to practitioners working in the field. The infill pastes comprised organic (epoxy, polyester), inorganic (slaked lime,hydraulic lime and zinc hydroxychloride) and mixed organic–inorganic (slaked lime mixed with a vinylic resin)binders. The selected aggregates were those most commonly used or those already present in the commercially formulated products. The infill pastes were characterised by SEM, MIP, open porosity, water absorption by capillarity, water vapour permeability, thermal and hydric expansibilities and adhesion to the ceramic body. Their performance was assessed after curing, artificial ageing (salt ageing and UV–Temp–RH cycles) and natural ageing. The results were interpreted in terms of their significance as indicators of effectiveness, compatibility and durability

Characterization of the glaze and in-glaze pigments of the nineteenth-century relief tiles from the Pena National Palace, Sintra, Portugal

The glaze and in-glaze pigments of the historical nineteenth-century glazed tiles from the Pena National Palace (Sintra, Portugal) were characterized using a multi-analytical approach. Chemical composition and microstructural characterization were ascertained by µ-PIXE, µ-Raman, optical microscopy and VP-SEM–EDS. The manufacturing technique and colour palette in these tiles were found to be close to the ceramic pigments used in traditional majolica. The blue and purple colours derive from cobalt oxide and manganese oxide, respectively. A mixture of Pb–Sn–Sb yellow with cobalt oxide and iron oxide was used for green and dark yellow, respectively, while grey tonalities consist of a complex mixture of cobalt oxide, manganese oxide and Pb–Sn–Sb yellow in different proportions. Results obtained allowed the determination of the oxides and elements used in pigments as well as production techniques, resorting to traditional majolica manufacture, although the tiles were produced by the end of the nineteenth century.

High-performance ceramic membranes with a separation layer of metal oxide nanofibers

In conventional fabrication of ceramic separation membranes, the particulate sols are applied onto porous supports. Major structural deficiencies under this approach are pin-holes and cracks, and the dramatic losses of flux when pore sizes are reduced to enhance selectivity. We have overcome these structural deficiencies by constructing hierarchically structured separation layer on a porous substrate using lager titanate nanofibers and smaller boehmite nanofibers. This yields a radical change in membrane texture. The resulting membranes effectively filter out species larger than 60 nm at flow rates orders of magnitude greater than conventional membranes. This reveals a new direction in membrane fabrication.

Ceramic membranes for separation of proteins and DNA by in situ growth of alumina nanofibres with a nanomesh of metal oxide nanofibres

Ceramic membranes were fabricated by in situ synthesis of alumina nanofibres in the pores of an alumina support as a separation layer, and exhibited a high permeation selectivity for bovine serum albumin relative to bovine hemoglobin (over 60 times) and can effectively retain DNA molecules at high fluxes.

The correlation of pore morphology, interconnectivity and physical properties of 3D ceramic scaffolds with bone ingrowth

In the design of tissue engineering scaffolds, design parameters including pore size, shape and interconnectivity, mechanical properties and transport properties should be optimized to maximize successful inducement of bone ingrowth. In this paper we describe a 3D micro-CT and pore partitioning study to derive pore scale parameters including pore radius distribution, accessible radius, throat radius, and connectivity over the pore space of the tissue engineered constructs. These pore scale descriptors are correlated to bone ingrowth into the scaffolds. Quantitative and visual comparisons show a strong correlation between the local accessible pore radius and bone ingrowth; for well connected samples a cutoff accessible pore radius of approximately 100 microM is observed for ingrowth. The elastic properties of different types of scaffolds are simulated and can be described by standard cellular solids theory: (E/E(0))=(rho/rho(s))(n). Hydraulic conductance and diffusive properties are calculated; results are consistent with the concept of a threshold conductance for bone ingrowth. Simple simulations of local flow velocity and local shear stress show no correlation to in vivo bone ingrowth patterns. These results demonstrate a potential for 3D imaging and analysis to define relevant pore scale morphological and physical properties within scaffolds and to provide evidence for correlations between pore scale descriptors, physical properties and bone ingrowth.

High-flux ceramic membranes with a nanomesh of metal oxide nanofibers

Traditional ceramic separation membranes, which are fabricated by applying colloidal suspensions of metal hydroxides to porous supports, tend to suffer from pinholes and cracks that seriously affect their quality. Other intrinsic problems for these membranes include dramatic losses of flux when the pore sizes are reduced to enhance selectivity and dead-end pores that make no contribution to filtration. In this work, we propose a new strategy for addressing these problems by constructing a hierarchically structured separation layer on a porous substrate using large titanate nanofibers and smaller boehmite nanofibers. The nanofibers are able to divide large voids into smaller ones without forming dead-end pores and with the minimum reduction of the total void volume. The separation layer of nanofibers has a porosity of over 70% of its volume, whereas the separation layer in conventional ceramic membranes has a porosity below 36% and inevitably includes dead-end pores that make no contribution to the flux. This radical change in membrane texture greatly enhances membrane performance. The resulting membranes were able to filter out 95.3% of 60-nm particles from a 0.01 wt % latex while maintaining a relatively high flux of between 800 and 1000 L/m2·h, under a low driving pressure (20 kPa). Such flow rates are orders of magnitude greater than those of conventional membranes with equal selectivity. Moreover, the flux was stable at approximately 800 L/m2·h with a selectivity of more than 95%, even after six repeated runs of filtration and calcination. Use of different supports, either porous glass or porous alumina, had no substantial effect on the performance of the membranes; thus, it is possible to construct the membranes from a variety of supports without compromising functionality. The Darcy equation satisfactorily describes the correlation between the filtration flux and the structural parameters of the new membranes. The assembly of nanofiber meshes to combine high flux with excellent selectivity is an exciting new direction in membrane fabrication.

A spectroscopic investigation of pigment and ceramic samples from Copán, Honduras

A combination of micro-Raman spectroscopy, micro-infrared spectroscopy and SEM–EDX was employed to characterize decorative pigments on Classic Maya ceramics from Copán, Honduras. Variation in red paint mixtures was correlated with changing ceramic types and improvements in process and firing techniques. We have confirmed the use of specular hematite on Coner ceramics by the difference in intensities of Raman bands. Different compositions of brown paint were correlated with imported and local wares. The carbon-iron composition of the ceramic type, Surlo Brown, was confirmed. By combining micro-Raman analysis with micro-ATR infrared and SEM–EDX, we have achieved a more comprehensive characterization of the paint mixtures. These spectroscopic techniques can be used non-destructively on raw samples as a rapid confirmation of ceramic type.

Fouling of tubular ceramic membranes during processing of cane sugar juice

This paper examines the fouling characteristics of four tubular ceramic membranes with pore sizes 300 kDa, 0.1 μm and 0.45 μm installed in a pilot plant at a sugar factory for processing clarified cane sugar juices. All the membranes, except the one with a pore size of 0.45 μm, generally gave reproducible results through the trials, were easy to clean and could handle operation at high volumetric concentration factors. Analysis of fouled and cleaned ceramic membranes revealed that polysaccharides, lipids and to a lesser extent, polyphenols, as well as other colloidal particles cause fouling of the membranes. Electrostatic and hydrophobic forces cause strong aggregation of the polymeric components with one another and with colloidal particles. To combat irreversible fouling of the membranes, treatment options that result in the removal of particles having a size range of 0.2–0.5 μm and in addition remove polymeric impurities, need to be identified. Chemical and microscopic evaluations of the juices and the structural characterisation of individual particles and aggregates identified options to mitigate the fouling of membranes. These include conditioning the feed prior to membrane filtration to break up the network structure formed between the polymers and particles in the feed and the use of surfactants to prevent the aggregation of polymers and particles.

Comparison of human alveolar osteoblasts cultured on polymer-ceramic composite scaffolds and tissue culture plates

The effects of medical grade polycaprolactone–tricalcium phosphate (mPCL–TCP) (80:20) scaffolds on primary human alveolar osteoblasts (AOs) were compared with standard tissue-culture plates. Of the seeded AOs, 70% adhered to and proliferated on the scaffold surface and within open and interconnected pores; they formed multi-layered sheets and collagen fibers with uniform distribution within 28 days. Elevation of alkaline phosphatase activity occurred in scaffold–cell constructs independent of osteogenic induction. AO proliferation rate increased and significant decrease in calcium concentration of the medium for both scaffolds and plates under induction conditions were seen. mPCL–TCP scaffolds significantly influenced the AO expression pattern of osterix and osteocalcin (OCN). Osteogenic induction down-regulated OCN at both RNA and protein level on scaffolds (3D) by day 7, and up-regulated OCN in cell-culture plates (2D) by day 14, but OCN levels on scaffolds were higher than on cell-culture plates. Immunocytochemical signals for type I collagen, osteopontin and osteocalcin were detected at the outer parts of scaffold–cell constructs. More mineral nodules were found in induced than in non-induced constructs. Only induced 2D cultures showed nodule formation. mPCL–TCP scaffolds appear to stimulate osteogenesis in vitro by activating a cellular response in AO's to form mineralized tissue. There is a fundamental difference between culturing AOs on 2D and 3D environments that should be considered when studying osteogenesis in vitro.

Preparation of porous calcium phosphate ceramic scaffold in bone tissue engineering

Calcium Phosphate ceramic has been widely used in bone tissue engineering due to its excellent biocompatibility and biodegradability. However, low mechanical properties and biodegradability limit their potential applications. In this project, hydroxyapatite (HA) and calcium phosphate bioglass were used to produce porous tri-calcium phosphate (TCP) bio-ceramic scaffolds. It was found that porous TCP bioceramic could be obtained when 20wt percent bioglass addition and sintered in 1400 degrees celsius for 3 h. Significantly higher compressive strength (9.98 MPa) was achieved in the scaffolds as compared to those produced from tCP power (<3 MPa). The biocompatibility of the scaffold was also estimated.