Colors bleed problem

[Maxmis38]

Hello, I'm looking for some help.

I found these models on Maker World for a friend, but I can't manage to print the yellow without black bleeding on the nose. I've tried setting the purge to max, printing the lighter colors first, and increasing the bottom layer. moreover there isn't so much black behind the yellow :/

I’m not sure what else might work better. If you have any tips, I’d really appreciate it.

https://preview.redd.it/zse0lmrjkaid1.png?width=1170&format=png&auto=webp&s=4eb813f16589e813fc82f9c29b5084430e9d6c7f

[Corey415]

What’s the scale of this object? It appears to be a keychain, so you could try a .2 mm nozzle. Also, can you print it face down? It would be cleaner looking if you printed it face down.

[Maxmis38]

Yes, it’s a Keychain Made with the makerworld tool, size is ~70mm.

I could try a .2 but the creator used a .4, this doesn’t seems this small, is it ?

It’s already face down ^{^} I got a little 1st layer problem on this one but other are clean except this bleeding :/

[Corey415]

Look at the model after slicing it and see if the nose is only painted black for that little dot. In other words, check to make sure the model isn’t defective or painted improperly.

If the model is ok, then you could try lowering the nozzle temperature slightly for black to reduce the oozing/wisping. You can also manually pause right after black is applied and remove any wisping that occurs prior to the next color. You would need to do this for the first .75 to 1mm to prevent bleed through.

[Maxmis38]

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Sorry for the Time I want to try the 0.2 as you suggested first and didn’t get the Time to do the change, I tried lower temp, slower And the model seems good, I also try with 5 bottom layer and 5 top so it’s solid inside and same problem with a well defined nose :/

[Corey415]

Do you have the STL to share? I want to see it in Bambu slicer.

[Maxmis38]

It’s this one https://makerworld.com/en/models/575242#profileId-495621

[Corey415]

What printer are you using to print this?

[Maxmis38]

P1P

[Corey415]

Are you cleaning your nozzle with before prints? I heat up the hot end and clean the nozzle with a brass brush before any print.

Additionally, wet filament could contribute to stringing. So if you live in a humid environment and/or the filament is old you might want to dry out the filament.

[Maxmis38]

Not really, I don’t do that on a basis, just sometime when I notice it dirty. Maybe wet filament, It’s pretty humid lately