This tutorial will tell you how to paint, in order to add color to the Shapeways White, Versatile Plastic material.
Our White, Versatile Plastic material is made by the SLS(Selective Laser Sintering) process on an EOS Formiga P 100 3D printer. The official name of the material itself is Fine Polyamide PA 2200. The material is a nylon(polyamide 12).
The material has a powdery feel to it because it a nylon powder(polyamide 12) that is sintered by a laser.
There are several types of paint that you can use to paint our White, Versatile Plastic
currently we have one tutorial that will deal with acrylic paints
Acrylic paint is one of the most common paint types. We have found that the best results occur when you use modeling paints. We liked the Tamiya Color Acrylic paints and were particularly impressed with the Revell Aqua Color line.
We tested both solvent and water based acrylics and could generally not find a noticeable difference in performance. Solvent based acrylics are flammable though, worse for your health and worse for the environment so avoid them if you can.
White, Versatile Plastic(SLS, Nylon 12, polyamide 12 etc.)is a porous material made from a powder that is sintered by a laser.
Because of this the material “sucks in” paint. Thin layers of your model are easily penetrated by paint.
The model below shows a 2mm thick part painted on one side.
If you flip the part you can see that the paint seeps through the model and enters into it.
Please take this into consideration when you only want to paint one side of a relatively thin part or if you would like to make the other side a different color. The penetration depends on the amount of paint you use. Less paint equals less seepage. It should not go more than a few millimeters deep but this would depend on how thickly you lather on your paint.
If we look again at the previous model we can also see what happens if we for a small portion of it do not paint in the same direction as we have for the rest of the model.
You see the lighter portion on the top of the first "e" , ugly right?
If you use too much paint on your brush when painting or simply apply too much paint to the model in general per coat the paint will collect on the surface and make your model look yucky.
See this orange model for a chilling example.
And do you see the little silver specs? That is what happens when you do not clean your brushes properly in between switching colors. We were using metallic paint on the brush previously. We make these mistakes so you do not have to.
A blue painted model:
We have a movie here that shows you the fun we had while painting.