% solids of clear

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PostPosted: Sat May 01, 2021 10:26 am
Ok so this might be a dumb question but I do not know the answer:

On the tech sheet for clears, what am I looking at that tells me the % solids? I see several numbers: weight solids package, weight solids ready to spray, volume solids package, and volume solids ready to spray?

Thanks in advance!

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PostPosted: Sat May 01, 2021 8:28 pm
They're all correct - just different ways of measuring. Remember that solids content is different for weight and for volume.

IMHO, the most important number is the % solids, by volume, ready to spray.
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PostPosted: Sat May 01, 2021 10:31 pm
^^^^^^^^I would agree with what Chris just said. In both wood and metal finishing classes I've taken over many years that is what most standards were built around. I think another important thing to remember is to be consistent in using that same standard when going from product to product for that comparison.
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PostPosted: Sun May 02, 2021 2:02 am
Thank you for your response

What is the difference between weight and volume solids?

Ok so what % would be considered high solids? What about medium solids?

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PostPosted: Sun May 02, 2021 7:56 am
Okay, so I dug back into some paint manufacturing files I had downloaded over the last 10 years or so. This statement addressing that came up....

By understanding paint volume solids you can calculate how much of each gallon of paint remains on the surface to perform its function. ... Volume solids predicts how much area a paint will cover and weight solids indicates the weight of the non-volatile ingredients.

As for percentages..... those can vary quite a lot and this has been changing somewhat throughout the years as paint tech. has changed. Just using Tamco as an example their highest stated stuff is 54% with their mid stuff being at 45%.

So here is a laugh....when I started in the furniture biz high solids furniture lacquers from Sherwin Williams were....wait for it.... 15%..... We now use clears up in the 45% to 55% range....
Last edited by DarrelK on Sun May 02, 2021 3:26 pm, edited 1 time in total.
Reason: spelling
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PostPosted: Sun May 02, 2021 3:26 pm
What % is considered a high solids clear?

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PostPosted: Sun May 02, 2021 3:36 pm
MS (medium solids) – solids content 40-45%
HS (high solids) – solids content 45-50%
UHS or VHS (ultra or very high solids) – 50% and higher

Mix according to directions to achieve the solid contents listed. Adding reducer changes the percent of solids in the clear by increasing the volume.
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PostPosted: Sun May 02, 2021 5:43 pm
^^^^^^^^^Yeah, those are the number ranges I see as well......
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PostPosted: Sun May 02, 2021 8:50 pm
Thank you very much guys!



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PostPosted: Wed May 05, 2021 8:02 pm
Thanks from me too.

I keep learning a bit here and there. So much appreciated.

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