It seems that open engagement at work in the 3DP community. In a recent post in the DIY 3DP group, one of its members (threedlabs) has provided details of a new eXperimental Solution which seems to work for 300 class hardware (basically any of the HP head models).
“From information obtained through patents, an HP10 or 11 cartridge needs:
Surface tension: 45 dynes/cm
Viscosity: 1.35 cps
My binder has:
Distilled Water, Surfynol 465, Glycerol, Potassium Sulfate
The Surfynol is obtained free as a sample. You can do it directly from the Air Products web site. You don’t need much, so a sample bottle lasts a while. The potassium sulfate works with the terra alba in the powder to dry the powder faster. People who work with plaster will tell you that Plaster + Terra Alba + Potassium sulfate is the magic combination.
For color binders, just add some Inkjet Colorant (about 3%). Cabot inks is a great source.
I hope this helps.”
Of course this post was almost imdeiately followed by a post requesting the mix ratios. Doesn’t anyone want to play mad scientist anymore? (I am I alone in this).
“Sure, here’s my binder:
The potassium sulfate is optional. It’s an accelerator for drying your plaster faster.
I also add a small amount of preservative. It’s optional, but will make the binder last much longer. I use Proxel GXL. Note: this is a dangerous preservative in concentrated form, so be careful if you decide to use it!
I’ve been sing this binder for a year, and my printheads last as long as when using zcorp binder. I use this with HP printheads, but Canon should be similar.
You may need to fine tune the ratios depending on where you get your chemicals. There are two tools that are useful in fine tuning:
Binder: Percentage (amount needed for 1 gallon)
Distilled Water: 93.45% volume (3537 ml)
Surfynol 465: 0.5% volume (18.92 ml)
Glycerol: 6% volume (227.12 ml)
Potassium Sulfate: 0.2% weight (7.5 g)
Proxel GXL: 0.05% volume (1.89 ml)
You can be sure that we will be testing this eXperimental Solution soon…