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Handling Printed Models
Post-Printing Treatment for Models Printed with Objet VeroClear
Photo-
Bleaching
Instructions
7–4
Models made with Objet VeroClear (RGD810) have a slight yellow tint
when removed from the printer. This is especially true for models printed
with a glossy finish. The yellow tint fades naturally over time, but you can
greatly accelerate this process by using a suitable photobleaching
treatment.
As a rule, best clarity is achieved when parts are printed with a matte
finish, and treated as explained below.
Photobleaching models involves exposing them to light. To achieve highly
controlled and predictable results, a professional illumination chamber is
recommended. However, adequate results may be obtained using ordinary
desk lamps fitted with suitable fluorescent elements.
Figure 7-2: Illumination chamber
Follow these instructions for photobleaching printed models.
•
The fluorescent lamps should be rated 45W, 6500K.
•
When using desk lamps, place the models in a container lined with
aluminum foil. Use at least two lamps, more when treating models in a
large container.
•
Arrange the models with enough space between them to allow light to
reach all sides of each model.
•
Verify that the ambient temperature around the models is
approximately 40ºC (104ºF). Higher temperatures may cause model
distortion; lower temperatures may not produce satisfactory results.
When using desk lamps, you can achieve the required temperature by
positioning the lamps approximately 10 cm (4 in.) above the models.
•
Inspect the models after six hours of treatment.
For parts with a matte finish, this should be enough. Polish and
lacquer the parts.
For parts with a glossy finish, continue the photobleaching
treatment for up to 18 hours more.
In Stratasys laboratories, there was a tint reduction of approximately
70% within six hours. After 24 hours, tint was reduced by
approximately 90%.
More information about this treatment is available in the application note
VeroClear RGD810 Model Material.
Figure 7-3: Desk lamps
DOC-13025 Rev. A
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