PolyJet - Dying Translucent PolyJet Models

Published 09/04/2014

Dying Translucent PolyJet Models


Introduction

Painting models can greatly enhance a clients impression but it also makes them opaque.  Dying adds color and life to your printed models while retaining translucency. 

Benefits

• Dying your models is faster and easier than painting.
• Translucency of models printed in Objet FullCure is preserved because the dye is absorbed into the
model material.
• Dyed models retain their original dimensions.

Required Tools and Materials

• alcohol-based aniline dye

  • Note:Water-based aniline dye does not penetrate the model surface. Use only alcohol-based aniline dye.

• isopropyl alcohol
• sodium hydroxide solution
• stiff-bristled brush
• spray bottle
• paper towels
• protective gloves

Preparation

IMPORTANT: Aniline dyes are toxic and the stains they leave on material are extremely difficult to remove.  Before working with aniline dyes, protect your skin, eyes, clothing, and your work area.

  1. Thoroughly remove the support material from the model and immerse the model in a sodium hydroxide solution
  2. If necessary, sand the model
  3. To lighten the color of your dye, add alcohol but do not exceed the ratio of one part alcohol to three parts dye.

Applying the Aniline Dye

Aniline dye penetrates the model in a few seconds, so you need to work quickly.  Brush or spray a light coat of dye onto the model.  You can spread the dye evenly over the model but wiping it with a paper towel. To darken the color or correct uneven tinting, apply a second coat.  If the color is too dark or blotch, wipe the surface with alcohol. Ally the dye to dry for at least 15 minutes.  Rinse the model and then dry it.

Applying a Protective Coat (Optional)

Spray on a clear lacquer or polyurethane coat to give luster to the model and protect the finish.