Stratasys J750/J735/J720 User Guide
5 Handling Printed Models
DOC-08040 Rev. R
5-4
Removing SUP705 with Caustic Soda
Soak models in a 1-percent solution of caustic soda (sodium hydroxide) to
remove Support material from difficult-to-reach areas and to give the model a
smooth, clean finish. The amount of time you soak the model in the solution
depends on how delicate it is and how much Support material needs to be
removed, but it is typically between half-an-hour and several hours. In any case,
you should remove as much Support material as possible before the caustic soda
treatment, and rinse the model thoroughly (with a water jet) afterwards.
Warning
Caustic soda may cause chemical burns, scarring and blindness. Mixing it
with water generates heat that could ignite other materials. Never pour water
into caustic soda. When diluting the solution, always add caustic soda to
water. Take adequate safety precautions; always use nitrile gloves when
handling caustic soda and models soaked in it.
Removing SUP706 with Caustic Soda and Sodium Metasilicate
Soak models in a 2-percent solution of caustic soda (sodium hydroxide) and
sodim metasilicate (Na
2
SiO
3
) to remove Support material. The amount of time
you soak the model in the solution depends on how delicate it is and how much
Support material needs to be removed. Rinse the model thoroughly under
running water afterwards.
SUP706 will dissolve into the caustic soda and sodium metasilicate solution
and saturate it, reducing its effectiveness. Replace the solution when the
Support material reaches 15% of the solution (after approximately one month
of average use).
Warning
Caustic soda may cause chemical burns, scarring and blindness. Mixing it
with water generates heat that could ignite other materials. Never pour water
into caustic soda. When diluting the solution, always add caustic soda to
water. Take adequate safety precautions; always use nitrile gloves when
handling caustic soda and models soaked in it.