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Stabilant 22 was intended to be diluted with four parts 99.9 percent alcohol...... I suspect that the Tweek product may have been made with 70 percent alcohol, in which the water component may have caused the oxidation.
Wouldn't the water evaporate like the alcohol? If the water didn't evaporate the electrical connection would be a very poor conductor.
Alcohol evaporates at a faster rate than water..... When trapped in connector contacts, the water has no place to evaporate.
Why wouldn't Sumiko obtain the already diluted Stabilant directly from the manufacturer? I.e., Stabilant 22A or Stabilant 22E. It's pretty obvious one should dilute Stabilant with a rapid-evaporating one such as Freon or pure alcohol.
From Applications Note,
"In what forms is Stabilant available?
The Stabilants are available in several forms. As a concentrate (Stabilant 22), an isopropyl alcohol-diluted form (Stabilant 22A), and an ethyl alcohol diluted form (Stabilant 22E). For example, a given size container of Stabilant 22A will cost about one-fifth the amount of a container of Stabilant 22 as it contains only one-fifth the amount of the concentrate. Another form of packaging is available. Stabilant 22S packages the concentrate such that it occupies one-fifth the volume of an otherwise empty container. This allows the end-user to add his own diluent, and thus saves the added costs of shipping the diluent (e.g.: isopropyl alcohol), as well as allowing the end-user to use an alternate diluent such as one of the Freon-based solvents.
In addition a 0.5 ml vial of Stabilant 22A is available for manufacturers to include with plug-in circuit boards."
I cannot speak for Sumiko.... I did search the web for the composition of the Tweek product itself, but couldn't find anything.
I will say that the Stabilant 22 concentrate, diluted with 99% alcohol per instructions, is a less expensive option than the Stabilant 22A pre-mixed with the alcohol. (The alcohol itself is inexpensive..... The caveat is that 99 percent alcohol is very flammable. The key reason why consumer alcohol is diluted to 70 percent.) So if it were to be remarketed (like what Sumiko did with Tweek), using the concentrate form diluted with separately sourced alcohol would yield a higher profit margin.
The definitive answer to this issue would be for a chemist to take the Tweek product and the Stabilant 22A, and check the composition of each product. (It could be difficult to find the Tweek product, it has not been marketed for years.)
It would probably have been smarter if Sumiko Simply charged more for Tweek but used Stabilant 22A or 22E direct from the source, if in fact that is not what Sumiko actually did. Sumiko was a high end distributor and it doesn't make sense they would try to cheapen a product to make a few cents. There are too many variables in this jig saw puzzle. As I intimated previously almost all contact enhancers are controversial.
NOTE: Cleaning all contacts including all non-audio contacts in the house with 92% isopropyl alcohol would be a big step forward.
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