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Common SLS Post Processing Method

Standard Finish

Smooth finished is the default finish of SLS printing services. Standard surface treatment

is the default surface treatment for SLS. Remove the part from the machine and remove all the powder from the part with compressed air. Then blasting cleaned by plastic beads or Quartz sand to remove the unsintered powder attached to the surface. Although the surface effect will be not very smooth, but the accuracy is good.

Roller Polishing

Roller polishing is a commonly used rough polishing process that makes the nylon surface smoother. This process can also be used if the Nylon/PA(SLS Printing Material contrast of PA12 /PA2200 /FS3300PA) part is to be colored later. Put the steel ball or small stone into the drum, and the drum vibrates at high frequency to achieve the grinding effect. As a result, this process does have a small effect on part dimensions and results in rounding sharp edges, so if parts with fine details and complicated functions are not recommended.


Dip is also a way of coloring, this is notably different from CNC machining PC or Acrylic parts Dyeing.with the advantage of uniform color and can coloring of very complex structural parts. Similar to the surface painting, in simple terms: the dip dyeing process is to immerse the part in the dyeing tank containing the dye and the required auxiliary agent, and the parts is gradually dyed by the dyeing cylinder circulation or the dyed object.

Waterproof Treatment

SLS printed PA parts have some inherent water resistance. If complete water resistance is required,the surface can be covered with a layer of epoxy resin by spraying or dip dyeing. The surface effect is smooth, the same as the standard finished, but you can feel the difference by touching.

Click here, to know more about 3D printing of SLA and SLS difference.

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