The type of ink does not preclude this examination.
If the initial date of commercial availability is more recent than the supposed date of the examined writing, then the document is not what it purports.
If additional entries are available that can be considered “known” regarding their preparation date, then comparative analysis may provide evidence to indicate the preparation date of the “questioned” writings.
Additionally, it is possible to measure the quantity of several semi- volatile components that are present in ink.
As the ink ages these components decrease and thus the approximate age of the writing can be determined.
We can determine the first date of commercial availability of the ink used to prepare any handwritten or handprinted material.
Because the samples are normally taken from the entire area of writing the legibility of the writing and the ability to perform additional tests are maintained.
In those instances where minimal writing or material exists, the extent to which an examination can be performed will be evaluated individually.
The chemical testing that is referenced does require removal of samples from the document.
Normally these samples are removed with a hypodermic needle sized hole punch and do not affect the legibility of the material.