I just Sleepy-ed myself a new flat top Roc.
I started with a white DX Roc that is from a recent run. It weighed 147.6g (marked 150g) and is made out of a barely-translucent blend of waxy DX- I can barely see my fingertips through the disc when I am holding it. I describe the plastic blend as waxy because it feels waxy to the touch, not because it has bad durability. I have 3 other Rocs identical to this one and they have average durability for DX. The PLH was 0.285" high. The disc stood 0.753" tall at the highest part of the flight plate dome. The flight plate domed up to the half-circle (that connects the bird to the Innova logo) and then flattened out. That is roughly 5.125" of flatness. I assume the hotstamp process flattened out the plastic.
I Sleepy-ed the disc as he recommended except I added a small food wrapper fragment between the disc and the cookie sheet to eliminate suction. It seemed to work. I put a thick gauge cookie sheet on top of the disc (about 1 pound?) and then I put a 5 pound sack of sugar on top of that, centered above the disc.
30 minutes later I uncovered the Roc and emptied the water. The Roc was extremely flat, like from-shoulder-to-shoulder flat. Just for the fun of it I repeated the process. I noticed the Roc re-domed when I put the next batch of boiling water into it but after applying the cookie sheet and sugar sack it eventually flattened out the same as the first time. Nothing different happened so I stopped after the second run. I mean... you can't get any flatter than shoulder-to-shoulder, right? I noticed there was a tiny clover that developed by the bird's tail, about the size of a quarter and really shallow. I have no idea where that came from but it doesn't really bother me at this point.
After letting the disc thoroughly quench at room temperature (no freezers for me) the profile is still as flat as when I pulled it from underneath the cookie sheet. I imagine a really hot day might
make it re-dome but I will have to wait for months
before I can test that theory.
Now for the results...
I don't have the scale at my house. I will fill in that blank tomorrow.
The weight was 146.7, it is now_____. ***EDIT: it weighs 147.6 grams after the process***
The PLH was 0.285", it is now 0.305".
The flight plate dome height was 0.753", it is now 0.61".
The diameter of the flat on the dome was 5.125", it is now 7.5".
So the PLH rose .02" (7%)
, the overall height lowered by 0.143" (19%), and it is now almost perfectly flat ***EDIT: and it gained 0.9 grams***. I think that's some interesting stuff. I wish I could throw it but it is icing really hard right now. I wouldn't really get a good feel for it.
Now that I'm thinking about it I wish I had taken some measurements after the first process. Oh well, I might save that for a later date.
I am super interested to see if the disc absorbed any of the boiling water. If it weighs significantly more than it did before the test then I will "dry it out" by placing it in a 110°f oven for 8 hours or so. And of course I will re-weigh it after that. Who am I kidding? I am going to dry it out even if it weighs the same as before.
I hope someone else gets something out of my nerdliness.