Trace Monotype with Microcrystalline Wax

It must be about two years ago now that I first posted on here about doing trace monotypes using a wee bit of microcrystaline wax mixed in with the oil based etching ink.  Here are some scans of section from the prints which were done about 15 years ago - I did not even have a press then.
Here is a link to the post where I first mentioned the technique  * followed by a  link to the other post 

* (The text written in purple is the relevant info. )