RSA is a soluble support material that dissolves in a solution with detergent.
RSA increases the convenience of printing complicated design figures by removing support even on hard-to-reach side of printed model.
On this blog post, we’ll discuss why support material is essential to consider for fine printing quality.
The type A530 uses RSA as a support material which is soluble, below we will explain why RSA has an advantage against other support materials.
General support material vs. RSA
Ordinary low-cost FDM 3D printers only have only 1 nozzle, meaning the printing material and support material is the same in nature.
In this case, it’s difficult to detach the printed model from same material support, and is incredibly difficult if the user needs to remove tiny support particles positioned at a hard-to-reach side.
1 nozzle printer extruding same material for both model and support printing
However, the type A530 has 2 nozzles, and each nozzle can extrude different materials separately.
So for example, user can use ABS for model printing in one nozzle, and use RSA for support printing in another nozzle. The dual print technology will greatly increase support removal convenience.
ABS and RSA are different materials and are being extruded from each separate nozzle, so each surface of printed model and support not being tangled to each other, but clean and easy to be removed.
And RSA is soluble in a weakly alkaline solution with detergent dissolved, so user don’t need to manually remove the supports but just put the printed model in solution.
This is a big advantage of soluble support as it can remove RSA supports even inside of complex form or tiny holes.
So user can get fine print outputs using RSA support even such complicated design like below images.
type A530’s 2 nozzle extrudes both printing and support material separately for better result
PVA vs. RSA
Many 3D printer users might be familiar with using PVA as support material, as PVA is also a soluble support material which can be easily dissolved in water.
However PVA is not as convenient as RSA, even it is dissolved in water, because PVA is weak against humidity hence difficult to maintain and control.
PVA filament in humid circumstance shall rapidly absorb any moisture in the air, so it being easily cut and resulting bad printing quality.
However RSA is strong against humidity as it only dissolved in weakly alkaline solution not in water, so RSA can increase successful printing result with great printing quality even in humid condition.
You can find more in here about specification and printing condition of RSA.