30 years ago I bought a bottle of silver paint from RS. I have none left so needed some more.
Bit of a shock looking at the price of the stuff so settled on buying a tub of MG chemicals silver plated copper particle water based stuff. The silver stuff has acetone so it has never been a problem drying out, one just adds acetone and it all dissolves again.
Still way too expensive in small bottles I decided to buy a can, 850 ml for several hundreds pounds, decant it into 30 ml bottles and get some of my money back via ebay. That aint going to happen now as ebay broke itself on Friday and though I can sell stuff I cannot get the money out because of rule changes, it is no wonder they make so much money when they steal 100% of ones hard earned cash.
Anyhow, that's nowt to do with this really.
So, I have these 30 ml bottles full of predominantly water with metal particles. I know from manufacturers data that 100 grams of the liquid, when dried should weigh 42 grams. I know that the density of a 50% copper silver mix is ten ish (I have no way to get that guess any better than that, obviously water is density one. 30 ml in these bottles is 50 mm tall.
As this stuff settles out of solution really quickly I wanted to make sure that I had a fair amount of mix, it takes ages to actually mix the paint and it only stays mixed for 5 minutes.
With the above data I calculate that I should have about 7 mm of sediment in each bottle if the sediment were solid. Clearly it isn't solid so let's say double it for a reasonable approximation.
This is not what I am seeing. This picture is after 24 hours.
Other info: On a balance beam with the water 68 mm from pivot the paint is 53 mm from pivot in order to balance.
All of this data should corroborate no matter how one does it but it just not adding up. So. moment, density, volume and practise, the picture being the actuality of the situation.
Not important, just irritating and I just know that someone on here will take on the challenge..