filter paper
Laboratory
21th Century
Recipe Details
Evidence
"the pH value of filter paper is around 7."
Remarks
The paper substrate is filter paper. Accelerated ageing causes cellulose degradation, forming carbonyl and carboxylic acid groups which act as chromophores, changing the polymer color from colorless to yellow or brown (p. 49). Acidity increases after ageing due to ink reactions and degradation products (p. 66).
Scientific Analysis
Chemical Compositioncellulose
Analytical Techniques
pH Measurements
Colorimetric Analysis
Certainty Level
Confirmed
Instrumentally Verified
Verified
Metadata
Material Type
paper
Paper Typefilter paper
Colorcolorless
RegionLaboratory
Approx. Year2050
Source Information
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