ZPrinter
®
150 / ZPrinter 250 User Manual
Post-Processing
38
All Rights Reserved
11/1/12
4 Post-Processing
After your 3D model is dry and fine depowdered, it can be infiltrated. When high strength is not critical,
Water Cure is a quick, easy way to finish parts. The best
concept
models are made using Z-Bond 90. Z-
Max Epoxy will confer superior strength for
functional
models.
4.1 Post-Processing Using Water Cure
4.1.1 Description
Water cure with Epsom salt is the best way to finish concept models quickly and easily. No hazardous or
restricted chemicals are involved: simply dissolve the Epsom salt into tap water and spray a fine mist over
the surface of your parts to give them a smooth, hard surface and a bright white appearance.
The Water Cure with Epsom salt method applies to all parts printed using zp150 powder.
Water Cure with Epsom salt can be used on color parts but colors will remain slightly muted.
4.1.2 Spraying vs. Dipping
IN MOST CASES, SPRAYING IS STRONGLY RECOMMENDED: it is quicker and easier than dipping.
Dipped parts require a large amount of salted water to be prepared and longer drying after dipping. Dipping
does not provide added strength.
In cases where complete penetration of thick sections is desired, the dipping method should be used.
4.1.3 Handling and Usage Information
The salt used in this procedure must be magnesium sulfate heptahydrate. In most countries, this is sold as
Epsom Salt. Do NOT use any other type of salt.
For storage & handling precautions of the dry salt, refer to the Epsom Salt package or consult your salt
supplier.
While mixing the salt solution and finishing parts, we recommend wearing gloves and safety goggles.
4.1.4 Set Up the Work Area
•
Place a clean sheet of non-stick material (Teflon, freezer paper or wax paper) on your work area for
easy clean up and to put your parts on as they dry.
•
Add a layer of paper towels where your model(s) will be placed to wick excess salt water away from
your model
Tip:
Have a sheet of the non-stick material on a tray so parts can be safely moved while they dry.
For spraying,
you will need a spray bottle (supplied with your starter kit or your upgrade kit).
For dipping,
you will need a sturdy, clean, watertight container (example: plastic, glass) and a graduated
container or some other means of measuring volume of water and salt.
4.1.5 Spraying method
Prepare the Salt Solution
1. Remove the spray head from the spray bottle supplied by 3D Systems.
2. Fill with Epsom salt up to the 7 oz. line.
3. Add tap water until you reach the 16 oz. line.
