1.) The Canon BJC-4100 and other printers does not seem to have separate
ink bottles marketed in all cuontries. Here you need to buy the whole head
because of that. There are also heads that have inseparable ink bottles.
A friend's is like this.

2.) I have looked at some discarded HP printers (HP495 or 695) and all I
can see is the usual gold/gold contacts for the head (prolly Rhodium
though). The contacts in the printer have sharp points and the head has
flat contacts. If the 'damaging' mechanism means the fact that the points
will make a small hole in the head pads when you pull it, thus destroying
the contacts, then know that most such heads are built like this. This is
not a damaging mechanism, it is the way to make good contacts between
flatcables of this kind. The thin plastic slip to be slid between before
removing makes sense now. I think that you can use mylar (Lexan?), or
carbonated drink bottle (plastic) or homemade carbonated d. bottle
(Lexan) to make one.

Peter

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