Kristof Deruyttere is a designer and community member, after an Ulti-evening talk he got to test some ecologically colored PLA here are his findings. -Alexander Baloche
We are one step closer to printing in fully ecological filament and thereby getting rid of the industrial chemical colorings. A team of grad-students at the Avans school in the Netherlands have been researching how that could work. Two of those Grad students are Max Kuiper & Jakko Theeuwens, they have given me some PLA¬† samples with natural coloring to test, The colors being Kurkuma¬† & Rubia. Both start with the same basic PLA resin and are then colored with these natural dies. The difficulty is in finding the right proportion of the filament and coloring.
Kurkuma is a herb used for coloring spices such as curry and is widely available to the public. Rubia is a bit harder to get a hold of because its made out the color-chemical found in carrots, the natural color is somewhere between cola and bronze.
And now for the more technical part of the tests:
4043D PLA Rubbia or Kurkuma +/-2,7mm
I printed the octopus¬†
¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬† Both are made with the same PLA resin, so settings where equal.¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬† Temperature printing: 210¬įC
Judgment: The Rubia filament was dark but transparent while Kurkuma filament had little bits and pieces in it and some small air-bubbles , but this actually did not seem to hinder printing. While printing there were remarkably few strings, even at higher speeds. The octopus required a lot of retractions , but the material didn‚Äôt seem to have problems with that at all, tough this might depend hugely on the build-quality of the Ultimaker. Somehow I was expecting to smell carrots and curry but luckily the prints are odorless (well except PLA-smell). For starters, the first layers sticked very well to the scotch tape and all it needed was a little skirt.
I set the fill¬† rate for the octopus to 5% and was curious to see how this would turn out:
- 100% speed OK, fill 5% hanging down
- 125%¬† speed OK, fill 5% hanging down
- 150%¬† speed OK
- 175% speed better!, fill 5% printed in straight lines like a spiderweb
- 200% speed, Even better!, fill 5% printed in straight lines like a spiderweb
While printing the filament loses most of the transparency,¬† but the color stays identical.
Printed objects in Kurkuma color reminds me of a well spiced rice-dish, but when looking at it from a distance it‚Äôs closer to gold. This filament is made with supermarket-grade Kurkuma and has these tiny pieces in¬†it, which gives it a really nice gloss and reflection though that isn‚Äôt very helpful when printing sculptures where you rely mostly on the shadows the shape casts.
Objects that will really be great with this? I am going for a golden Louis14-style (Google:’palace of Versailles’) , think about treasures, jewelery, golden cups or grails.etc. ¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬†¬† As for the Rubia, well it has this shiny bronze /caramel look to it, but I can‚Äôt really point out any real specific purpose for this color. Vases should look awesome¬† due to the mystique radiance it gives of.
How will this continue? The grad students will publish their results for the final exam and further contact some companies to see if these great filaments can make it to the public. But wait there‚Äôs more, next year another group of students are going to pick up with this research and continue to investigate¬† and develop these products.