Kickstarter Update #5 - Complex Prints, Safety Concerns, and Resin Properties

Complex Prints, Safety Concerns, and Resin Properties


Hey Everyone!
First off we’d like to thank you, our backers for all your support, because of you we’ve now raised over $500,000. That’s 1000% of our funding goal! We are very grateful for the support you’ve given to this project :)
We are issuing this update to address a few of the more popular topics/requests that have been coming up in the past few days:
- Images/Video of Detailed Prints
- Safety Concerns
- Resin Properties (strength, melting temp, smoothing techniques, etc.)
Detailed Prints

Many of you have been requesting to see the Peachy Printer produce prints of a more detailed objects! We ask for your patience in this matter. Currently the Peachy is good at printing basic objects. The software needs a bit more work before it can do justice to a more complex object. We initially weren’t planning on furthering development during the campaign as you can imagine, our plates are loaded with other tasks. To the contrary, we also understand that this is an important thing for our backers to see! Luckily due to the success of the campaign our software developers are excited to start working now, before the money to pay their wages even arrives.
Hang in there everyone! We hope to provide you with video and images of a more complex print soon! Thanks for being understanding.
Safety Concerns

For those of you who’ve expressed concerns about safety issues: we assure you that our product will be sent with warning labels necessary to educate the user about proper safety procedures. Many common products people use on a daily basis can be extremely dangerous or lethal when not used with proper precautions and common sense (Examples: Vehicles, bleach, gasoline, knives, etc).
The laser in our current prototype is 20mw. It will not burn your skin. It will damage your eyes if you look directly into the beam. Once the printer kit is assembled (the laser is not to be turned on until the printer is fully built) in order for that to happen, you would have decide to stick your head underneath the printer and look up into it as it’s printing. This is where proper use procedures and common sense come into place.
As for the resin, we can’t give specific details on technical or safety data as PeachyJuice is still being developed. However, you can take a look at the Data Sheets for MakerJuice SubG. This is the resin that we’ve been testing with and it's what PeachyJuice is based off of. It will give you a good idea of what the technical and safety data will be for PeachyJuice.
http://makerjuice.com/docs/SubG-MSDS.pdf
We recommend that you treat the resin like you would treat a common household cleaner (windex, bleach, pledge, etc). Don’t eat it, don’t rub it on your skin, don’t put it in your eyes, and keep it out of reach of children and pets.
It’s our responsibility to inform our customers of the risks that come with using our products, and the proper safety procedures used to avoid these risks. It’s the customers responsibility to read and follow them. As with many products, if the proper safety procedures are followed accidents should not occur.
Proper Disposal Procedures

Some of you have been asking about how to dispose of the resin due to it’s “Hazardous to aquatic life” warning. The resin becomes inert once fully cured so the proper way to dispose of it is to let it cure and then throw it in the garbage. The resin does not mix or dissolve into water, so the salt water can simply be poured down the drain so long as it’s completely separated from the resin.
Resin Properties

As we mentioned above, we don’t have technical data for PeachyJuice yet as it’s still in development, but MakerJuice SubG is a good reference point:
http://makerjuice.com/docs/SubG-TDS.pdf
For your convenience we’ve pulled out the basic technical data from the link above:
Experimental Shrink: 8%
Ash Content: < 0.25%
Surface Tension: 33.5 Dynes/cm
Tensile Strength: 9100 PSI, 5%
Elongation Shore Hardness: 75 D
Glass Transition Temperature (solid to liquid): 104°C
Uncolored Reactivity: 440 mJ/cm2
Water content: < 0.3%
Viscosity @ 20°C: 25 cP
Acidity: < 0.3 mg KOH/g
Density @ 25°C: 1.052 g/cm3
Smoothing Techniques

As far as we know, there is no equivalent to an acetone bath. The hard resin does however sand down very nicely. You can also dip the finished print in resin and let it cure, repeating this process until your print is perfectly smooth.
That’s all for now folks! Have a great evening and we’ll be back with another update tomorrow.
Thanks,
The Peachy Printer Team :)