black base/euro vs. SS black

@dhutton01 , didn't you have a pic showing one of your black Camaros sitting beside another black Camaro at a car show. Best illustration I've seen on how black SPI SS is.
This one…
DD3921B8-9FC9-40EF-9534-6070BC2A8BD7.jpeg
 
I posted the comparison for information purposes only and to basically answer the question of the OP (me) with real results that I could see first hand. The panel was sprayed with 3 coats of black epoxy, sanded smooth with 150, 3 more coats of black epoxy, sanded with 400. Then it was sprayed with 3 coats of black single stage. Two areas masked off, then sprayed 2 coats of black base. Then removed masking from one singe stage area and 3 coats of Euro 2020. So, ALL SPI products. Cured in direct sun for 3 days, wet sanded with 1000, 1500, 2000, 2500, then compounded with a wool/foam hybrid pad. I didn't bother with the final polish.

Trying to compare colors or hues of one color between two pics on a computer is a fools game, IMO. That's why I did the test on one panel to see it first hand. The pics above all show beautiful SPI blacks, no doubt. If someone can shoot black base with Euro2020 over it and hold it next to the single stage jobs shown above, I would love to see the result.

The single stage black on my test panel looks beautiful inside under led lights and outside in the shade, but seeing it side by side in the direct sun is different. If I could get the same black look as the pic in my original post with singe stage, I would be more inclined to use singe stage for the ease of use. That's what I was trying to determine.
 
I posted the comparison for information purposes only and to basically answer the question of the OP (me) with real results that I could see first hand. The panel was sprayed with 3 coats of black epoxy, sanded smooth with 150, 3 more coats of black epoxy, sanded with 400. Then it was sprayed with 3 coats of black single stage. Two areas masked off, then sprayed 2 coats of black base. Then removed masking from one singe stage area and 3 coats of Euro 2020. So, ALL SPI products. Cured in direct sun for 3 days, wet sanded with 1000, 1500, 2000, 2500, then compounded with a wool/foam hybrid pad. I didn't bother with the final polish.

Trying to compare colors or hues of one color between two pics on a computer is a fools game, IMO. That's why I did the test on one panel to see it first hand. The pics above all show beautiful SPI blacks, no doubt. If someone can shoot black base with Euro2020 over it and hold it next to the single stage jobs shown above, I would love to see the result.

The single stage black on my test panel looks beautiful inside under led lights and outside in the shade, but seeing it side by side in the direct sun is different. If I could get the same black look as the pic in my original post with singe stage, I would be more inclined to use singe stage for the ease of use. That's what I was trying to determine.
My conclusion is that base clear is best suited to your work process. I am willing to bet that a little more time buffing and polishing would reduce if not eliminate the differences. Optical clarity is the key here imho.

Maybe I’ll get myself some black base and repeat the experiment. :)

Don
 
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Seems to me SS is always going to be blacker and more pure looking than black base clear. Especially in the sunlight. The clear reflects differently giving it that grey-ish white reflection.
 
Been doing a little more thinking here. I think it is possible that applying masking tape over freshly sprayed single stage has caused significant die back. Interesting the worst looking sample is the one that was masked the longest. I have seen first hand how this can happen. The best looking sample never had masking tape applied to it after the clear was applied. The euro single stage sample had masking tape applied for less time than the single stage sample. The samples should have been physically separate and never had masking tape applied.

I am also thinking that the brown cast we are seeing is due to the trapped solvents attacking the black epoxy. Maybe Barry can comment.

So now I have a different conclusion…. :)

Design of experiments is a science in itself. Lots of control samples etc are needed.

Don
 
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Black blacks are different than, say, a mixed chevy or ford black made to match, and that makes it more sensitive to use.

Things that can affect how it looks:
Cheap urethane reducers.
Fast urethane reducers.
Fast activators.
Internal gun strainer either in gun your disposable cup system.
Adding blue tint.
Using a 1.3 tip and wetting the floor.
These are the only reasons I can think of.
 
I didn't mean to start a firestorm here, or criticize any product, just provide a direct comparison between the two blacks. Removing the direct sun or lighting makes a world of difference in the appearance Here is what it looks like on an overcast day.
The panel was sprayed with an LPH400, about the same temp and humidity in all spray sessions, 3M pps cups, no gun strainer, slow SPI reducer and activators. I'll respray the SS to negate any affects of masking, although the original panel was cured two days in full sun before masking. Masking tape was only on the outline of the section with paper covering the rest.
black in the shade.jpg
 
Seems to me SS is always going to be blacker and more pure looking than black base clear. Especially in the sunlight. The clear reflects differently giving it that grey-ish white reflection.
I know this is an older thread but the subject keeps coming up.
Chris, has what I think is the best explanation. I may try the SS next time just to get a personal and up close look as I cut and buff it.
 
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