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Shellac preparation
Hello all.
I have been using shellac for a while now and the most tricky part of shellac for me is its preparation. I used to mix the total amount of shellac flakes and denatured alcohol togheder and wait for the mix to be ready and this seldom happened, sometimes I got a transparent solution and sometimes I got a suspension with the flakes floating in alcohol and I knew of no way to make it transparent from there. Using filter paper from chemystry supplyes did not yeld a clear transparent liquid, filtering is slow due the shellac clogging the filter paper pores so I dropped that. I dont know how to precipitate it. After using some shellac in this condition the restant part, mostly shellac flakes, dried after a good while and formed a sticky goo in the flask. Later I came up with this method: Cover the flakes with denatured alcohol, but using a part of alcohol in the cut(just to cover the flakes in alcohol), and wait for a day of so Then I pour the rest of the alcohol carefully to the dissolving flakes. I used a syringe with a needle to do so and I sprayed the alcohol on the flasks walls so by the time the alcohol touched the solution it would not stirr and just deposit itself of the top, making a visible layer of clear alcohol on top of the already dissolving flakes. After using the rest of alcohol I let it sit overnight to let it to get in a homogeneous transparent solution. With this method I could get a very transparent shellac cut. I used a syringe to remove the top layer of shellac, leaving the dissolved flakes undisturbed. Sometimes I poured more alcohol with the syringe and I guess the flakes keep releasing more shellac. After I gathered all the transparent liquid, I just leave the flask with the dissolved flakes on the shelf and after a month of so the alcohol evapored leaving a brown cake on the bottom, the texture of the cake is gum like, easyly removable from the flask and like a soft gum to the touch but not sticky. So this is it. I browsed the web for a method to prepare shellac cut and the actual preparation was often omited, going straight to the application part. I wonder if this method of preparation is allright? How do you prepare your shellac? Konstantin. |
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