Re: tips for using dry pigment
Hi Judy, It's good practice to grind powdered pigment w/ a little water and/or gelatin solution before mixing it into the bulk solution in order to get a better dispersion w/o pigment clumps. Also, it's good practice to filter the glop (as we name it -> that's the term carbon printers use for pigmented gelatin w/ other ingredients like sugar, glycerin and alcohol) through fine cheesecloth or nylon stocking just before pouring so that you get an even better dispersion free of bubbles and a very even coating w/o any bits. I just omitted doing it with my first tissue and the carbon prints from that particular tissue exhibited irrelevant bits of pigments here and there, ruining every single one... Actually, carbon printing is pretty easy / straightforward once you manage to make a good tissue -> that's the real hard part of the whole process (not mentioning the strict environment requirements). Of course, there's always the possibility of buying ready made tissue. Fortunately Bostick-Sullivan makes nice carbon tissue for the more outcome oriented and/or faint hearted. Regards, Loris. 13 Mayıs 2009, Çarşamba, 8:07 am tarihinde, Judy Seigel yazmış: > ... > I've probably copied more out of the copyrighted text than is legal, but > there's nothing about mortar & pestle. Instead you let the gelatin swell > in cold water, let it sit 20 to 30 minutes, fill beaker with water to 1 > liter, place in crock-pot with more water, & set on high... The gelatin > will melt in 30-40 minutes, add sugar & stir til dissolved. Add the > glycerin, add the pigment & STIR, MIXING WELL. "YOU DO NOT WANT ANY > PIGMENT SITTING ON THE BOTTOM AS IT WILL CLUMP & GET GRAINY IF IT COOKS > THERE." NOW YOU LET THE BUBBLES ESCAPE, KEEPING HOT FOR 1 & 1/2 HOURS AT > LEAST... THEN POUR & SPREAD WITH COMB." (Please excuse capital letters, I > must have hit the caps lock in error.) > > But just reading this wears me out... Have you considered a nice simple, > easy process like, for instance gum printing ???!!!
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