Two more transparent reds - Ruby Slippers and Crimson - from CiM - and I struggled with these. I don't know what it was - but I could NOT get Ruby Slippers to strike.
Transparent reds are striking colours - they lose their colour when heated to molten - and then you let them cool, and re-introduce them to the flame, and the "strike" - regaining their red colour. Generally - I have no problems with the transparent reds.
But not these two. I had the same problem with both Ruby Slippers and Crimson. I don't know if it was me or the glass. I did try both of them on the same day - for what ever that is worth.
Other testers for Ruby Slippers report results from difficulty striking to a "glorious, garnet red."
From the left, we have Ruby Slippers on white, on clear, and two self coloured beads. The end one (yellow) - was clear when it went into the kiln. Maybe they needed to kiln strike.
Again - Ruby Slippers, and I was definitely having trouble striking it. It was also hazing up on me. The haze has come out sort of a muddy colour.
Although - if you wanted to do something with a variegated yellow and orange - this might be just exactly what you are looking for.