OT: Gold aluminum plus isopropyl alcohol equals purple color?

[Corvid]

I don't know what that is, so I don't know whether anybody here has
any idea what it is.
Purina Fancy feast cat food cans, the top is gold colored aluminum. I
usually wipe the inside corner with a few drops of isopropyl rubbing
alcohol.
The paper towel always turns out pinkish, purpleish. What is that? It
does NOT come from the label. The label is nowhere near the wiped
area.
Some sort of coating on the aluminum seems strange, but I cannot
imagine what else would discolor the paper towel. A reaction between
the aluminum and isopropyl alcohol seems like a remote possibility,
but I really have no idea.
The gold color is made with paint?
Thanks.

The idiot posted this to a *metalworking* group!

[John Doe]

A nym-shifting stalker, usually "Corvid" also "Charger Boy", still sore from being spanked in (sci.electronics.repair)...

see also...
=?UTF-8?Q?C=c3=b6rvid?= <***@ckbirds.org>
=?UTF-8?B?8J+QriBDb3dzIGFyZSBOaWNlIPCfkK4=?= <***@cows.moo>
Banders <***@mailchute.com>
Covid-19 <***@message.header>
Corvid <***@ckbirds.net>
Corvid <***@ckbirds.org>
Cows Are Nice <***@nice.moo>
Cows are nice <***@cows.org>
Cows are Nice <***@cows.moo>
dogs <***@home.com>
Edward H. <***@gmail.com>
Edward Hernandez <***@gmail.com>
Great Pumpkin <***@patch.net>
Jose Curvo <***@mymail.com>
Local Favorite <***@palomar.info>
Peter Weiner <***@gmail.com>
Sea <***@coast.org>
Standard Poodle <***@poodle.com>
triangles <***@home.com>
and others...
--

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Newsgroups: rec.pets.cats.health+behav
Subject: Re: OT: Gold aluminum plus isopropyl alcohol equals purple color?
Date: Sun, 26 Sep 2021 12:38:25 -0700
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I don't know what that is, so I don't know whether anybody here has
any idea what it is.
Purina Fancy feast cat food cans, the top is gold colored aluminum. I
usually wipe the inside corner with a few drops of isopropyl rubbing
alcohol.
The paper towel always turns out pinkish, purpleish. What is that? It
does NOT come from the label. The label is nowhere near the wiped
area.
Some sort of coating on the aluminum seems strange, but I cannot
imagine what else would discolor the paper towel. A reaction between
the aluminum and isopropyl alcohol seems like a remote possibility,
but I really have no idea.
The gold color is made with paint?
Thanks.

The idiot posted this to a *metalworking* group!

[Edward Hernandez]

The John Doe troll stated the following in message-id

The troll doesn't even know how to format a USENET post...

And the John Doe troll stated the following in message-id

The reason Bozo cannot figure out how to get Google to keep from
breaking its lines in inappropriate places is because Bozo is > CLUELESS...

And yet, the clueless John Doe troll has itself posted yet another
incorrectly formatted USENET posting on Mon, 27 Sep 2021 17:30:28 -0000
(UTC) in message-id <sisv3k$n4a$***@dont-email.me>.

[Edward Hernandez]

The John Doe troll stated the following in message-id

The troll doesn't even know how to format a USENET post...

And the John Doe troll stated the following in message-id

The reason Bozo cannot figure out how to get Google to keep from
breaking its lines in inappropriate places is because Bozo is > CLUELESS...

And yet, the clueless John Doe troll has itself posted yet another
incorrectly formatted USENET posting on Mon, 27 Sep 2021 17:30:28 -0000
(UTC) in message-id <sisv3k$n4a$***@dont-email.me>.