Hey all,

The problem,
One of the 1st and strongest of SWIMs pulls has dried out properly in terms of crystal population.
The naphtha SWIM was using has a pink dye but leaves no residue. (Coleman Fuel - Premium Blend)
Some of the pulls have perfect white crystals.
The crystals from the initial (and best) pull have pink-ish crystals.
SWIM has now bought better naphtha (Ronsonol) and is wondering how they would remove the dye from the crystals..

Thanks!

designer crystals eh? sweet put up a pic!
sorry not sure how to help you, just wanted to see some pink spice!
good luck

SWIM tried to take a picture but my camera isnt great..
It looks off-color but its hard to tell which.

after freeze precipitation nice white Chrystals in the dish.
after scraping they turned pink...??

Just found this question while poking around for something else.

Anyhow, your crystals are clearly contaminated by particulates carried over from the powdered bark you used.

Redissolving in the minimum amount of warm naphtha followed by careful filtering and another freeze precipitation would clean that up. It looks like you've explored recrystallisation a bit by now and sorted this out for yourself