A step-by-step guide - Chemical damage tool

General

Select Modules from the start-up page and then select Incorrect relative humidity or Incorrect temperature as agents of deterioration. A list of deterioration processes for which risk may be quantitatively assessed by means of available tools is displayed. Select the Chemical degradation tool.
Alternatively, select Tools in the upper menu line and select the Chemical degradation tool from the list.
The list of data sets available for calculations is displayed with the average levels of relative humidity and temperature over the period covered by the data. You can view plots of each data set by selecting Graph. From the list, select one or more data sets to perform calculations. You can select between three ways of obtaining quantitative measures of climate-induced chemical damage risk to materials for the environmental data contained in the uploaded data set:

• press Relative lifetimes to calculate relative lifetimes expected for three categories of low stability materials
• press Lifetime-paper to calculate lifetime of unstable paper materials
• press Lifetime-cellulose acetate to calculate lifetime of cellulose acetate undergoing hydrolitic decomposition

Relative lifetimes

Relative lifetimes of paper materials, cellulose acetate or a general category of low stability organic materials are displayed for each selected data set together with the average levels of relative humidity and temperature over the period covered by the data.
You can use Constant climate calculator at selected constant environmental conditions. Enter values of temperature and relative humidity of interest and press Calculate relative lifetimes.

Lifetime-paper

Enter the name of your paper material, its current and critical polymerization degrees of cellulose DP and its acidity – reflected in the cold water extract pH value. Press Calculate lifetime. Lifetimes of the paper material are displayed for each data set selected.

Lifetime-cellulose acetate

Lifetimes of cellulose acetate are displayed for each data set selected together with the average levels of relative humidity and temperature over the period covered by the data.

On each of the pages you can view plots of the results by selecting Graph. You can graphically explore your data in two ways. Move the cursor over the plot to dynamically display the time/parameter coordinates of data points. Zoom in by selecting a fragment of the plot. A double click resets the zoom in selection. After viewing the data, click Back above the plots to return to the respective results page.