Got my slick pads today.
I'm going to have to do some more experimenting, because the thickness of the pads definitely changes the heat and pressure dynamics. I started out with the slick pad and the tortilla press and wasn't getting very good results… I adjusted the position of the nugs and tried to apply more pressure, which helped a bit.
I switched to the hair straightener. I used a higher heat (something like 372ºF I think) and tried to take advantage of being able to focus my pressure on a smaller surface area. That helped. The slick pads are definitely cool products with great physical properties. Be careful though, because the silicone definitely stays hot a lot longer, especially when you're taking the whole thing in and out of a tortilla maker.
I'm looking forward to seeing how different folks moisture experiments work out.
This was the real kicker. Halfway through I remembered reading about RH and adding moisture, so I thought what the hell I'll give it a shot.
I took a .3 gram nug and carefully applied a few drops of water. This felt like a weeeeird thing to do, since I'm used to keeping my nugs the hell away from water! I was surprised by how hydrophobic the nug was, as the drops of water just sat there indefinitely on the surface. Then I realized that this shouldn't have surprised me; of course, it's a flower! Anyways…
I added mutliple drops to compensate for the fact that most of the water simply ran off of it, trying to get some small amount of moisture in there. I pressed it out in the hair straightener and WOW! Significantly improved yield, at least 2-3x just eyeballing. Tried it again in the tortilla maker. Boom, same deal.
So, yeah. In the realm of moisture, heat, pressure, and time… Moisture is seeming to be king??
By the way, the purity of the rosin has gone up since switching from parchment to slick pad. I think it has to do with a combination of pressure distribution changing the way the flower presses, a decreased stickiness, and eliminated melting of parchment. No screens involved.