1 hour ago, tikidoc said:I see you have mastered the stripe!
I have been intending to post about the tape I used. It was recommended to me by @Miriam G (for which I thank her) and was intended to be used with the Cricut machine for making designs. I don't yet have a Cricut but decided to get some of the tape and cut it with a paper trimmer. The downsides: it is difficult to separate the tape from its backing (though the technique can be mastered) and the sheets of tape (it's not on a roll) are not large enough to be able to cut one stripe for an entire row of cavities. But the upside is that the tape really sticks, even better than the vinyl (electrician's) tape used by Andrey Dubovik. It also conforms to the curves of a mold cavity the best of anything I have used. One caveat: It's crucial to leave a tab to grasp the tape when removing it--it sticks so well that it takes some force to remove it.