Yes, I fully agree, there is big danger with using of "feeding" products which are not reversible. On the other hand, a think there is difference among various such products.
For examle:
I do not have any experience with Lexol, but it is quite obvious, that Lexol is "commercial name" of product and I am not sure, if we know its real and exact (chemical) composition (and rates of ingredients) - detailed recipe is not always put out. On the other side, Lanolin is so called "chemical trivial name" of an essential and natural substance (composed of various chemicals, but the composition is well known to professional all over the world). From Wiki: Lanolin is a wax. Historically, many pharmacopoeias have referred to lanolin as wool fat; however, as lanolin lacks glycerides (glycerol esters), it is not a true fat. Lanolin primarily consists of sterol esters instead. Lanolin's waterproofing property aids sheep in shedding water from their coats.... Lanolin's role in nature is to protect wool and skin against the ravages of climate and the environment;...
But to shorten this input: Once I discussed with the restorers of Náprstek´s Muzeum in Prague the problematics of collecting African artefacts and we spoke about old shields made of heavy leather, too. Their standpoint was not clear to mee too much since they would like to avoid everything and if possible to close items to some specialised depositories/safes, where everything would be constant. Nevertheless they admitted, that if necessary, solution of Lanolin could be used - but in a small quantities and very carefully....
(nevertheless, this problematic is far away from what I am trying to solve now - how to make new leather old...)
|