Printbrite+ ? Has anyone any experience with this?

[rjenkinsgb]

My Kossel XL has been working very well until about a week ago, when a PETG print lifted a layer of glass out of the bed, despite a fresh coat of bonding/release spray before each print...

I had ordered some Printbrite+ during lockdown, which arrived a few month back but I did not do anything with it.

Glass bed turned over, printbrite applied, all cleaning & curing instructions followed carefully.

The first print I tried broke loose after a couple of layers.. I re-read the instructions & realised I'd done the pre-print clean with acetone, instead of soapy water. Try again, pre-clean with soapy water and it worked as advertised!
Three or four prints, all OK, just releasing once the bed started to cool.

Then I set up a large area 12 hour print, same clean - and it broke loose in the middle of the night & wasted the lot.

I'm not sure if I'm doing something wrong with it, or it's just an unreasonably critical surface??

Any ideas? I have things I want to print but don't want to waste masses of filament if its going to be hit & miss on which stay attached to the bed.

(I have a new 300mm diameter Borosilicate bed on order just in case).

[samlogan87]

I use to use it but I had several large prints fail which annoyed me so have moved to a garolite bed and use magigoo and it has been working well. I did also use PEI which was good.

Sam

[mrehorstdmd]

PETG sticks to PEI very well without any goo. I've never had one let go or partially lift. Taking large prints off can be tricky, but adding a few drops of IPA to the bed after the print is finished usually allows the print to be pried up easily (this works for other print materials, too). The right tool helps- I use this, bevel side down, to remove prints: https://www.olfaproducts.com/olfa-scr-l-model-1086562-scraper-multi-purpose-60mm.html

[dc42]

@rjenkinsgb do you mean Printbite+?

I use the original Printbite on my delta printer and PETG sticks to it well. I use 80C bed temperature. It releases easily after I allow the bed to cool.

[rjenkinsgb]

@dc42
OK thanks, I was using 70'C, that may be the problem!

I'll try it at 80'C