Logotype of the Asociación de Productores de Piedra Natural de Castilla y León

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Resistance to SO2
(slate DIN 52206). 5 cm of surface are used 6 plates of 15 xs, of that one stays inalterable for reference. The 5 water plates submerge until constant weight and, next, they are introduced in a steam camera with a sulphided acid solution to 5% during 28 days, renews in the 14 days. The percentage variations of weight and the possible superficial alterations are observed.
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Parque Tecnológico de Castilla y León. Edif. de Usos Comunes · 47151 Boecillo (VALLADOLID). Tel. and Fax: 983 54 81 38
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Logo Piedra Natural Logotype of the Federación Española de la Piedra Natural Logotype of the Agencia de Inversiones y Servicios de Castilla y León Logotype of the Junta de Castilla y León Logotype of the ARTEPYME program Logotype of the Ministerio de Industria, Turismo y Comercio Logotype of the Fondo Europeo de Desarrollo Regional