(minutes after marking with the Sewline vanishing marker)
Knowing I still had plenty of marking, and suspecting I could run out, I stopped at my LQS for more on my way home from work on Monday. I'd been hoping for a different brand, and they had Sewline ones in stock, so I got 2. These are extremely different. The ink glides on smoothly and evenly in a single stroke, leaving a scarily dark purple line, which was easy to see even on the darker teal fabric. But this stuff almost fades before the eyes! I woudn't recommend marking more than you can quilt in about half an hour - giving yourself some leeway for interruptions etc. I did a bit of a test; marking a few lines at about 3am, just before I went to bed this morning. I took some photos immediately (above). For comparison, I took more photos after collecting James and Eleanor from school and having crumpets for afternoon tea (below).
(about 13 hours after marking with the Sewline vanishing marker)
This (above) was taken about 13 hours after marking. The lines have totally and utterly vanished! I'd been warned about the effects of sunlight, so as soon as the lines were marked, I folded the quilt over itself a couple of times, and none of the quilt would have received direct sun through the day, although it was near a window.
I remarked this afternoon, and the next photo shows the Sewline after about an hour, already starting to fade considerably (edit: still useable on the light, but I had to remark the dark areas):
(about 1 hour after remarking with the Sewline vanishing marker)
The verdict so far - I won't bother with the Hemline again - it's a pain getting the marks on, and they haven't faded as I'd hoped. I will use the Sewline markers again though - but take care to only mark very small amounts at a time! Next up I want to try the Collins markers. They are what Judi of Green Fairy Quilts uses, so I figure they must be pretty good.
By the way, this is not a sponsored post. I bought the pens myself and am simply sharing my experiences. Of course, if anyone wants to send me some free markers, I won't object!
As for the actual quilting - it's plodding along. I won't mind if I never quilt that filigree pattern again though! Now, I'd better go and quilt that last bit before those lines vanish again!