Security clip to discourage theft and a procedure for manufacturing such a security clip

Abstract From the Canadian patent

A security clip includes a transparent reservoir filled with a non-washable, non-freezing, non-toxic ink which is under pressure. A needle is fixed on the lower side of the reservoir and is used to attach the reservoir to electronic security tags for clothing. If the clip is improperly removed from the electronic tag by a shoplifter the reservoir, breaks open releasing the ink and permanently staining the article to which the tag was attached. Use of the reservoir in combination with an electronic security tag provides extra protection against the shoplifting of protected articles from stores.