The Ts of the untreated, un-inked areas did not vary in
comparison to those of the treated areas, suggesting that after the
treatment, the fibres were in the same condition as they were
before. This implies that the treatment did not damage the collagen
molecules, thus suggesting that from this aspect, this treatment is
safe to apply. Moreover, this supports Gonzales et al's 
statement when saying that the structural dimension of the
parchment substrate returns to its original state after applying a
concentration of >70% organic solvent : deionised water
(isopropyl alcohol, a polar solvent, was used to conduct this
test). These results are also consistent with Woods' theory that
suggests that the less polar a solvent is the less likely is it for
damage to be inflicted on the fibres. 
The combination of Velvesil Plus™ (silicon cross-polymer) gel
and 5% w/v benzyl alcohol was identified as more effective. The Ts
test also proved that the treatment did not damage the substrate.
It was noted that skin textures affect the degree of success of the
removal treatment. Such an issue, along with the complete removal
of Velvesil Plus™ gel residues from the parchment substrate, need
to be investigated further.
Larsen, R. (2002) Microanalysis of Parchment. Archetype
Conservation and Restoration of Parchment,
(2008).International Seminar and Workshop [of] Conservation and
Restoration of Parchment, pp 44.
Gonzales, L., Hiller, J.,Terill, N., Parkinson., J., Thomas,
K.,Wess,T. (2012) 'Effects of isopropanol on collagen fibrils in
new parchment', Chemistry Central Journal, 6, (24), pp. 4
 Woods suggested that non-polar solvents would not be as
damaging to the substrate. He states that only polar solvents are
damaging, due to the polarity of water.
Woods, S, C. (2002) 'From skin to parchment', Papier
Restaurierung, 3, (4), pp. 16
Woods, C., Conservation forum. (1995) 'Conservation
treatments for parchment documents', Journal of Society of
Archivists, 16, (2), pp. 221-238.