Hydrometer - Baume Scale

Why would you measure Baume to arrive at viscosity? Buame is more related to density of a liquid.

Measure viscosity with cup or viscometer.

how about the flowability of the liquid? i dont know why they have the same baume value but one is ok for spraying and the other is not.

Is it possible that a water base mixture compared to an alcohol based mixture will have different baume but both can be used in spray? The water based mixture has a 70 baume and the alcohol based mixture has 51 baume. What other factors can affect the "sprayability" of a liquid mixture. My goal is to standardized the coating used for molds in foundry, but since there are many suppliers for mold coating i have to put up a standard realating to baume value that can be used in spraying of the molds, my initial target is 50 baume but after many suppliers one submitted me a water based coating ang i was surprised that a 70 baume on the water based can already be used for spraying, but this contradicts to my prevoius target of 50 baume. So i am asking questions now regarding this matter, it seems to me that i cannot used baume scale as a standard in preparing mold coating.

Forget Baume. At least as a measure of "sprayability". It measures density.

That doesn't measure the resistance to shear forces that viscosity does.

You must measure the viscosity, but it is a very simple test.

Either by simple:

Zahn cup - Wikipedia, the free encyclopedia

Or an instrument:

Viscometer - Wikipedia, the free encyclopedia

As LynLynch said, the Baume scale (like any other scale commonly used on hydrometers, like Brix, Balling, and Specific Gravity) is a measure of the density of a liquid. Density is weight per unit volume, and has no relationship whatsoever to viscosity.

There are a number of terms that are used by non-scientists to describe liquids, and those terms are often poorly defined. For example, oils are commonly described as 'light' or 'heavy'. Here, 'heavy' has very little to do with weight, and a great deal to do with viscosity. A very 'heavy' oil will still float on water, so it has a density lower than that of water. A hydrometer would indicate a lower Baume value for the oil than the water.

Viscosity is resistance to flow due to internal friction within a fluid. Cold molasses is a common reference for a substance with high viscosity. 'Water-thin' is a term sometimes used to indicate a low viscosity, as in cements (glues), yet there are a number of liquids with lower viscosities than water. At room temperature, acetone has a viscosity of about 0.4 cp (centipoises), while water has a viscosity very close to 1 cp, and heavy oils can easily have viscosities above 600 cp.

I'm no expert on spraying, but clearly higher pressure would be required to spray fluids with higher viscosity. Surely there must exist different nozzles designed for different fluids (different viscosities). Ever seen gunnite (concrete) being sprayed?

Abandon the hydrometer, until you want to check batteries or make wine or beer...