Replicant wrote:Here I am, over a year later than everyone else as usual.

After watching Liam Montier's effect in Reel Magic, I just got myself a couple of these pens in black and I'm quite excited about the possibilities. But as Farlsborough mentioned, the ink is slightly paler and watery than your average rollerball pen; has anyone managed to find a pen that closely matches the Frixion's ink? Otherwise I can see myself in Smith's, trying out all their loose pens for a match and looking suspicious, like I usually do.
You're in luck... I had the same problem...
I bought a Blue Frixion, and the ink looks weak.
So, to get a good result...
Go to Poundland, where they do a complete set of coloured ballpoints for — yep — £1. In there is a grey/blue one, which matches almost exactly.
Then, go to Staples/Paperway/[insert your local stationers here] and buy a couple of Papermate ballpens, and transpose the Frixion and Poundland ink stems into them.
It's a bit of a squeeze at first, but I now have two identical pens, one of which is Frixioned. (Plus a whole load of lovely coloured ballpens!)
Re: heat... Flash paper is just about good enough, hand heat is a no-no, and unless your cup of tea/coffee is straight from the kettle, it's iffy.
ALSO don't press too hard with the Frixion on the paper. That leaves indents, which are visible after the Frixion does it's disappearing act.
AND THERE'S MORE: I've been writing a lovely trick using a playing card and a disappearing fingerprint... (well, transposition of a fingerprint) which is very visual, and involves nowt more than an old inkpad loaded with Frixion ink
I'm also unable to replicate the 'reappearing' effect mentioned by NH...???