This is not really the exactly correct place to post this but there isn't a better one that I can see for drawing attention to this, so here goes. Probably the very simplest method for spraying pigment (or liquid), other than filling your mouth with it, is using a T-shaped tube system which you blow through and it picks up the liquid through what I believe is known as the Venturi effect. One tube (the leg of the T) is in the fluid in a vessel (jar, bottle or other) and you blow through the other (the top or bar of the T). The fluid is sucked up the vertical tube and sprayed out the far end of the horizontal part as it and air is propelled out the nozzle. I believe I saw one of these a long time ago, possibly a refined version, but now a friend asked me not only if I had heard of one but where it might be bought. What is the generic name for these (to make a search easier) and does anyone perhaps know where they are available ?
I had googled the link (potters) but, sadly, it seems so outdated that none of the items and/or suppliers mentioned seem to exist - apart from those that are compressor driven.