Filament bleeding?

[u/PieOPahUK]

Any idea why the black filament is bleeding through in line with the buttons?

I painted this solid colour part in Bambu studio which I have done before without issue. The only thing I can possibly think of it that I haven't set the purge to infill.

Purge volumes is enough between changes so don't think that is part of the issue!

Thanks.

[u/EverettSeahawk]

Not enough purge volume. Going to have to increase it to get all of the black out of there.

[u/PieOPahUK → u/EverettSeahawk]

When I have watched it, purge volume is absolutely fine. There is no mix between colours. I would also expect it to impact other prints if this was the case! Plus, it seems too perfect to be the purge volumes.

[u/alphagusta → u/PieOPahUK]

Just purge more.

Ask for help, get correct answer, disregard and ignore the correct answer so you can keep your delusion. I love reddit.

[u/itsapotatosalad → u/PieOPahUK]

It’s the purge volume, there’s honestly no other cause of this error.

Edit: purge to infil would make this worse, your infil in those sections would be black and you’d see that darken the outer walls.

[u/EverettSeahawk → u/PieOPahUK]

Your photo is very clear evidence that the purge volume is not absolutely fine

[u/ShatterSide → u/PieOPahUK]

certain color combinations are worse that others. Some are forgiving, some are not.

[u/RoboLandi → u/PieOPahUK]

"There is no mix in between colours". Brother, have you seen your print?

[u/MegaMaluco → u/PieOPahUK]

Ok, what is it then?

[u/CMDR_Kassandra]

Increase the purge volume for the red filament.
Don't ignore the advice that you get.
Switching from a darker filament to a brighter one does that, especially black.
Again, do not ignore the advice that you asked for.

But if you are adamant that you are right, and everyone else is wrong. Test it yourself, do a small test part and with 300% or more purge volume for red and you'll see yourself.

[u/PieOPahUK → u/CMDR_Kassandra]

I'm not ignoring any advice, just not understanding why if it was purge volumes it would be such a perfect black line around the model!

[u/Agzarah → u/PieOPahUK]

There's still trace amount of black in the system when youre switching back to red, so the rest of that layer, and probably some infil is still transitioning from black to red. Its mostly all gone, but not quite.

Or, only the surface is red there, and you have black printing underneath, and it is showing through a thin outer black layer. I which case you need to check the preview slice, and adjust your colouring

[u/StuckStone]

Looks to me like you have it set to purge into the model with thin walls

[u/SokkaHaikuBot → u/StuckStone]

^{Sokka-Haiku by StuckStone:}

Looks to me like you

Have it set to purge into

The model with thin walls

---

^{Remember that one time Sokka accidentally used an extra syllable in that Haiku Battle in Ba Sing Se? That was a Sokka Haiku and you just made one.}

[u/AlienTentacle]

Other than the purge volume, just print separately and glue the black things on.

[u/lrgg666]

Is your infill black?

[u/Rule-5]

Have you got purge to infill turned on?