After reading a bit I think the problem is the room temperature (Spain 5°C to 10°C), but just to tell you that I had to change the FEP film 3 times because
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Commerce', 1801-1805, Spanish School, Tempera on canvas, P02546. Painting by Francisco de Goya -1746-1828- - Pixels
File:Manola (Sketch for advertisement) by Julio Romero de Torres, Cordoba, c. 1900-1910, oil and tempera on canvas - Museo Nacional Centro de Arte Reina Sofía - Madrid, Spain - DSC08489.JPG - Wikimedia Commons
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Open Air Painting in Trillo, Spain | Victoria Olson Art - Watercolor, Egg Tempera & Oil
Sant Nicolau, Pere Terrencs, around 1500, tempera on panel, Mallorca, Balearic Islands, Spain Stock Photo | Adobe Stock
Valencia sets new heat record during third Spanish heatwave of the summer | Euronews
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Spanish Old Master tempera on panel, circa 1400 — Ottocento
tempera painting on the ceilings of the palace of the Dukes of Infantado oldest provincial museum in Spain in the Spanish city of Guadalajara, Europe Stock Photo - Alamy
Altarpiece of Saint Christopher', 14th century, Spanish School, Tempera on panel, 26... Painting by Anonymous - Pixels
TEMPERA STUCK AND GILDING ON A SPANISH PANEL, END OF THE… | Drouot.com
The Romanesque Altar Front of Avia. . Around 1200, Tempera on wood with metalic ornamention from the..., Stock Photo, Picture And Rights Managed Image. Pic. YL2-2848159 | agefotostock
Maria Theresa of Spain (tempera on paper) by Joseph Werner
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Spain braced for record April temperature of 39C as extreme heat causes misery | Spain | The Guardian
Tempera Painting on glass depicting the Infanta of Spain. XVIII century- Cm 25x20, - Auction Antiquariato e selezioni d'Alta Epoca - Casa d'aste La Rosa
Average temperature in Pamplona (Navarre), Spain (fahrenheit)
Palacio de Cristal Madrid, Spain 2021 | Victoria Olson Art - Watercolor, Egg Tempera & Oil
Climate change: Spain breaks record temperature for April - BBC News
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What Are The Hottest And Coldest Places In Spain? - Sanitas Health Plan Spain
Altar frontal from Santa Margarida de Vilaseca. 2nd half 12th c. Romanesque art. Tempera on wood. SPAIN. CATALONIA. BARCELONA. Vic. Vic Episcopal Museum. Proc: SPAIN. CATALONIA. BARCELONA. Santa MarÕa de CorcÑ. Convent
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Image of A street in Seville (Spain), 1908 (tempera on paper) by Golovin, Aleksandr Jakovlevic (1863-1930)
Course of the average annual temperature in Spain. The average annual... | Download Scientific Diagram
Record May temperatures for Spain | Official blog of the Met Office news team
St. Nicholas of Bari (tempera on panel) by Spanish School
File:Saint Peter. Tempera painting by a Spanish painter, 14th cen Wellcome V0018225ER.jpg - Wikimedia Commons
Altarpiece Spain Studio of Pete Espalargues 1490 CE Temper… | Flickr
Gran Canaria registered the second highest temperature in Spain: 45.1°C
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Spanish School, 13th Century | Tempera frescoes adhered to panel | MutualArt
A roller-coaster of temperatures in South Europe. Spain (by Diego Fdez-Sevilla, PhD) | Diego Fdez-Sevilla, PhD.
Spanish (Catalan) Painter | Salome Dancing before Herod | The Metropolitan Museum of Art
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Spain: average annual temperature 2022 | Statista
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Heat wave across Spain (surface temperature image)