The Opaque pigment range is superb....For 3D printers!! Yes, I'm mixing them in with CLEAR resin to create custom colours.... and using a Resin 3D printer to create ANY colour of prints! Have included an example of a custom brown I made for a keyboard I've developed, a Custom Beige for another keyboard and some neon Heroquest minis - just adding a tiny dash of neon yellow into the clear resin! I've also been able to colour match many items and 3D print. Resin8's customer service is superb , responsive too. Delivery times are also good, with reasonable P&P fees. You don't need much is very true, a 30G jar will last you many, many liters of resin....so, make sure you buy loadsa colours, and also the starter kits to mix your own. Highly recommend purchsing some small syringes (without needles) to assist you in mixing....jewellers scales work well for good between batch colour matching, Or just lollipop sticks, and maybe some rubber gloves, it can get everywhere :-)