This is an old thread but I was wanting to share my personal experience with a cold water tek that seemed to yield a semi pure product (it is hard to tell since I have never had had a pure MPH product to compare).
filter, cold water, aluminum foil, and the Methylphenidate
pills. (I only used 2 pills as to test the theory and not waste, but more would make the process easier).
Process: 1) lay out your sheet of tin foil, the coffee filter, water, and the bowl/plate you use to crush the pills next to eachother so things are organized and ready.
2) crush the pill(s) into a fine powder
3) Dump powder onto the center of the coffee filter and try to fold up the edges so none spills, and it stays in a nice little pile.
4) hold the coffee filter containing pills above the sheet of foil (form the filter much like one would when parachuting pills in a tissue/ napkin, but leave the top open so you can poor water into it)
5) Now take the water and start by putting a couple drops into it, keep adding until it is mostly dissolved, but is still a paste like texture (one would want to use less water so its not to much liquid)
6) you will see a milky colored liquid dripping through the filter onto your foil, (this is supposed to be your MPH after most of the binding agents are filtered), mix the solution and press down on the coffee filter, slightly squeezing it out.
7) you will wring it dry with your fingers above the sheet of foil, continuing to get as much water/MPH through the filter and onto your sheet as possible. Whats left in the filter is the binders and the liquid you squeezed out on the sheet is MPH.
8) discard filter with gunk in it, (unless you want to put a little more water through to get a better yield but I did not in this particular experiment, nor do I know if it would be worth it really)
9)spread the water/MPH solution around as evenly as possible on the foil, just like you would when making a sheet of cocaine
(I was not able to find out for sure if adding sodium bicarbonate to the filtered liquid was neccessary to get a sheet, there were mixed opinions and ideas and I was anxious, so I just decided to try without)
10) let it dry, than smoke it sheet style, get spracked!
So I have alot more experimenting to do with this idea, and I know some say that MPH is not very soluble in water, but than others claim it to be very water soluble so I took a stab in the dark but I got very high off this sheet, like way ripped!! It tasted similar to Ethylphenidate
but a little sweeter, it was not harsh or to smelly and a couple hits had me flying! I am happy I tried this because you get more out of the purer product with less unpleasant tastes or nasal clogging issues, I would recommend this to anyone who is wanting a quick, effective crack
like high. the whole process took 15 minutes and that includes drying time, very easy. I probably could have explained it in a more simple way but I wanted to be sure that anyone who read it had enough detail to do it, So i apologize for such a complex explanation of such a simple process! Hope this helps someone have a good night, Cheers!