Heat Line caused by silicone wrap?

[MattMose]

Hi all,

Recently switched to using a halogen oven on the recommendation of [MENTION=7061]webtrekker[/MENTION] and others. Everything's going wonderfully, except a big yellow line running the length of the mug seemingly where the metal clamp is touching the mug (through the silicone)...

Anyone have any experience with this? At first I thought it was the heat tape (which I've tried different varieties of just to be sure), however it goes almost top to bottom. It's hard to get a picture as it can be very feint, but now I know it's there it's all I see.

I'm wondering if the metal clamp is causing intense heating of the mug on that particular area causing the yellowing?

It's a fine line between cooking the image enough and not getting the yellow line. I've tried a piece of paper between the wrap and the sub paper and it seemed to work, but that was the last one I cooked. I don't know if this is something I'm going to have to continue to do from here on.

As always, advice appreciated.

[webtrekker]

I used a piece of teflon sheet, cut slightly larger than the silicone wrap, placed between the transfer and the inside of the silicone wrap and that seems to do the job.

[MattMose]

Didn't think to use teflon but I've got a spare sheet kicking about so that'll do perfect. Is this a known issue with the hot metal of the wraps then?