Discussion in 'Finishing Techniques' started by CLERCYSOPHIE, Oct 14, 2011.

    hi everybody,
    who could give me information of the resin that Shapeways use to infuse the full color sandstone?
    thanks a lot!
  2. aeron203
    aeron203 New Member
    It is cyanoacrylate, a.k.a. super-glue. It is a special quick-curing, fume-free formulation designed for Zcorp prints.

  3. stannum
    stannum Well-Known Member
    If fume free... could you explain why some white zones appear sometimes?
  4. aeron203
    aeron203 New Member
    Fume-free is a misnomer. It's their way of saying you can stand near an open tub of it (with ventilation above) and you won't be blinded and pass out. The whiteness, called "blushing" can happen for a number of reasons, like too high a temperature (the accelerated reaction makes it heat up quickly) or excessive humidity. It definitely has fumes and a smell to it, but it is very different from regular CA and actually isn't unpleasant if you accidentally get a whiff. Still, like when you buy "odor-free" paint thinner, you are going to want to treat it like the normal stuff.

    Yes I know for the cyanocrylate... Very toxic, expensive and not good in time.... But they speak about a new resin, polyester which have an infinite pot life and becomes hard in hoven. Anybody knows the name of that resin?
  6. aeron203
    aeron203 New Member
    Interesting. I have only heard the new process as being CA based, but it would not surprise if there were some polyester in it. Polyester actually cures normally by itself, which is why it expires (polymerizes). I have heard of baked polyester finishes for cabinets etc, but the highest quality are still two-part.

    If you want the exact formulated material, just give Zcorp a call. You can only shop their online site if you have a customer number, but I don't see why they wouldn't sell you some over the phone.

  7. stannum
    stannum Well-Known Member
    Thanks for the tip about no fumes, it sounds like old CA vs new CA glue; years ago they smelled a lot, created white areas quick and caused lots of heat when in contact with skin, new ones are a lot less aggressive, and even more resistant to shock and temperature.

    The old resin, XLAForm, was oven based and a "polyester backboned oligomer, modified with esters of acrylic acid" per the MSDS; maybe that was the one you heard about. It blured prints and changed light colors too much, giving a yellowish tone. Also scratched easily, so if not coated things quickly became full of white lines. Maybe it was great for strong big things, but not so much for detail ones.
    I heard about Xlaform, and saw all the videos...they said that the resin doesn't change the color and is a "revolution"... And says that Shapeways use their technology...I tried to contact them.... No way, and the zcorp seller in France have all the difficulties to communicate whith them...!