I don't have the fortitude to go diving into the bins under the table just yet.
I've been testing again, I did a barter with a blog buddy and got these Crayola washable markers a while back which I've been using. I haven't found the fine tipped ones here in Australia, just the thick ones and they're no good for my purposes.
I recently read about these pens from England. They are Berol handwriting pens that are designed to wash out of clothing and used by young children learning to write with a pen. They make a nice fine line but again, not available here.
I bought a pile off EBay which was the cheapest option and they cost around $AU 1.60 each including postage. You can get dark blue, light blue and black.
Both test samples went into cool water but then I decided to switch them to a bowl of warm soapy water. I used the dish washing liquid that was sitting on the bench since it was handy.
They sat in the water for 45 minutes while I went and did other things. I did swish them a few times at the beginning.
The results speak for themselves, not a skerrick of a mark on either sample. You can read more test results on the Berol pens over on the Feather On A Wire blog here.
As always, I'd recommend that you do your own testing.
And just because I'd like a progress photo on my blog.
No free motion Friday today, I haven't organised myself, maybe I'll get on the machine today.