Stratasys J850 Manual page 126

SUP706: 2% caustic soda and sodium metasilicate solution
While wearing protective gloves, break away excess Support material on the
outside of the model. For delicate models, use a toothpick, pin or small brush
after dipping the model in water.
• For SUP705, after breaking away excess Support material, soak the model
in a 1% caustic soda solution (see "Removing SUP705 with Caustic Soda"
on page 5-4).
• For SUP706, after breaking away excess Support material, soak the model
in a 2% caustic soda and sodium metasilicate solution (see "Removing
SUP706 with Caustic Soda and Sodium Metasilicate" on the next page).
For most models, the most efficient way to remove Support material is by
using a high-pressure water jet. One suitable system is the Balco WaterJet
cleaning unit. This device is marketed by Stratasys.
To clean a model using this device, you place it in the chamber, and you
manipulate it and the jet using the built-in, waterproof sleeves. A pump turns
ordinary tap water into a high-pressure jet, and a wiper keeps the window
clear.