LET’S RESIN Metallic Pigment Powder, 5 Colors Fine Resin Pigment Powder, Each Bottle 20ml Resin Color Pigment for Epoxy Resin Coloring, Polymer Clay and Other Crafts

First of all, these powders are beautiful. Right off the bat, just opening them all and looking at them, I can tell they’re going to be amazing in my resin pieces. I also work in real metals (I am a metalsmith/jeweler), but there are times when you want the look of metal without the weight of it. Resin is a great way to achieve that. I was wondering how they got such a fantastic metallic look to these powders, and a quick scan of the packaging tells the story: they use real metals. Huzzah!So I just got these delivered today, and I opened every jar to compare the volume of the contents because many previous reviewers seem to think there is less silver than promised. I wanted to know for sure. Volume looks the same for all powders, including the silver. The silver noticeably weighs less than the others, though. I pulled it out of the box and went “whoa, this feels lighter. hmm..” BUT … (science lesson incoming)You cannot weigh volume (mililiters is volume, not weight, and not all elements weigh the same per volume) on a scale. If you are reading this, please ignore EVERY REVIEW that shows these bottles on a scale. All they prove is that the silver powder does indeed weigh less than the other powders. If you bother to open the bottles and do a simple visual inspection, you will see there are approximately equal volumes in each jar.Apparently no one remembers basic science. You don’t weigh anything in mililiters, you weigh in grams, ounces, etc. Conversions between weight and volume will depend heavily on the density of the material. The scales everyone is showing are set to liquids, so they are making an assumption (likely the density of water) to convert weight to volume.The back of the package indicates that the powders are made up of copper, zinc and magnesium. These are metals, and they each have a distinct color and… wait for it… WEIGHT. 1 ounce of copper will not weigh the same as 1 ounce of magnesium, in case you didn’t know.Each of these powders is comprised of the different metals to get the colors. I’d wager the silver is made up of magnesium and zinc, so it would weigh less than the golds/copper/bronze which are likely made with copper (which is quite heavy). The packaging promises 20ml of each — by VOLUME. And it appears to be there.End of science lesson. So, if you want some quality metallic powders — go right ahead and buy these, and fear not — the silver is the same volume as the rest.