I’ve been tipped to a new solution for PLA adhesion that works incredibly well. I’ve printed objects with square corners that cover nearly the entire print bed (190mm) and it works like magic. No curling or lifted edges. Compared to Kapton on “blue tape”, it is easier to apply, has a nicer finish and is infinitely less expensive.
Solution: one (1) part white glue to ten (10) parts water. Turn up the heated bed to your PLA print temp (~60-70c). Mix the solution throughly – should look like thin milky water. Dip a folded paper towel in to get it damp, then swab the printer deck. Make sure it coats the deck evenly. Yes, it will appear streaky. Wait until the heat from the bed dries up the solution – you’ll see it go from shiny to flat/opaque.
I usually run 10-20 prints before I feel the need to re-apply. If you go days between prints, its probably a good idea to re-apply to get the standing dust off the print surface.
Yes, it is true that the glass-side finish of the prints is not as smooth at bare-glass prints – but you’ll notice that its nearly impossible to remove the parts from the glass until you let them (part and glass) cool to room temperature. I’ll take a 10% reduction in surface quality any day over a lifted print.
I’m curious to see other’s results with this method.
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