## 3 Results and Discussions
### Specific Climate Risk Assessment Results  
A specific climate risk assessment model for museum artifacts has been developed by [PERSON] [38]. This model predicts the risk of biological, chemical, and mechanical degradation for paper objects (books, documents, etc. ), panel paintings, wooden furniture and wooden statues, of which museum collections are comprised. The temperature and moisture content of the air are related properties. Biological processes of damage begin when certain conditions of air temperature and relative humidity are met: the temperature should be between 0 \({}^{\circ}\)C and 50 \({}^{\circ}\)C and the relative humidity should be higher than 70% [51]. The total growth of active fungi is calculated based on the growth rate. A prediction of mold growth for the NW room, NE room, SE room, and basement, based on the indoor climate conditions, is shown in Figure 16.  
It was predicted that no germination would occur in the NW room, NE room and SE room, for which no mold growth was expected, while in the basement, favorable conditions for mycelium growth occurred. Table 11 shows the predicted annual mold growth for each room based on the indoor climate measurements. Figure 16: Specific climate risk assessment of mold growth for NW room, NE room, SE room and basement, “Poni-Cernátescu” Museum, 2020 (www.monumenten.bwk.tue.nl, accessed on 23 February 2022). Major preservation problems are due to chemical changes that are influenced by storage T (\({}^{\circ}\)C) and RH (%). All organic materials in collections deteriorate because of chemical reactions that go faster or slower according to T (\({}^{\circ}\)C) and RH (%). Examples of chemical deterioration are the discoloration and embrittlement of paper due to chemical changes at the molecular level through chain scission in cellulose molecules. The rate of attack on cellulose linkages varies over time, depending on the temperature and moisture content of the paper. Higher temperatures cause molecules to move faster, collide more and react more rapidly with each other. With higher humidity more water is available for hydrolysis reactions [52; 53; 54; 55; 56]. Table 12 shows the deterioration processes that are related to an incorrect indoor climate. Mechanical forms of deterioration are warping of paper sheets or wooden panels, splitting of wood veneers, gelatin delaminating of glass plate negatives, shrinkage of textiles, etc. Changes in moisture content of these materials cause them to swell or shrink. When such reversible dimensional changes are uniform and unrestrained, they usually do no harm [57]. Sometimes, however, if layers that swell are bonded to layers that do not, or if one part of an object has more moisture than another, deformations, delamination or cracks will result. Both welling and shrinking can be destructive and such problems can occur at any time in the life of a susceptible object. RH (%) is the principal environmental factor concerned here; as long as the moisture content of the objects remains fairly constant, temperature changes or the absolute level of temperature have relatively little bearing on these problems [58]. The predicted risk of mechanical degradation for each room is shown in Table 13.  
Artifact preservation indices are used for quantitative risk analysis. The correct interpretation of the preservation indices facilitates the decision-making process regarding the establishment of the risks of deterioration of the cultural goods. The preservation index (PI) indicates the effects of a constant amount of temperature and relative humidity on the chemical deterioration of artifacts on a yearly basis [58]. \begin{table}
\begin{tabular}{c c c c c} \hline \hline  & \multicolumn{4}{c}{**Modul Growth Rate**} \\ \cline{2-5}  & **NW Room** & **NE Room** & **SE Room** & **Basement** \\ \hline Paper & safe & safe & safe & 8 mm \\ Panel painting & safe & safe & safe & 8 mm \\ Furniture & safe & safe & safe & 8 mm \\ Sculpture & safe & safe & safe & 8 mm \\ \hline \hline \end{tabular}
\end{table}