I had to add my 2 cents worth. I used a rough and ready mix of about 2/3 methylated spirit and 1/3 of automotive acrylic lacquer thinner (mainly acetone) because these were the closest to requirements that I had on hand. The image was printed on ordinary copy paper with my HP 8150 Laserjet. I was a bit sceptical and so it was a pretty rushed tryout. I lightly burnished the paper with the back of a spoon as it dried and carefully brushed with an old soft toothbrush to get rid of the last of the paper fibres after soaking in water for about 10 minutes -- Well to my surprise, I got the 2 best boards that I have achieved with any toner transfer setup (and I have tried many different papers and a few different printers) I etched and drilled the boards this morning, The etch was clean enough for the drill to self centre too ! This will be my method for homebrew PCB's from here on --- I might have just been very lucky with the mix of solvents but I stress that this was a really rough test so the process doesn't look to be too finicky to me -- try it you may just be as happy with the result as I am.
Regards Greg VK5GJ