{"id":27473,"date":"2017-02-16T09:00:10","date_gmt":"2017-02-16T14:00:10","guid":{"rendered":"http:\/\/www.shapeways.com\/blog\/?p=27473"},"modified":"2018-02-08T16:05:08","modified_gmt":"2018-02-08T21:05:08","slug":"bhda-finishing-tips-and-techniques-support-and-nub-removal","status":"publish","type":"post","link":"https:\/\/www.shapeways.com\/blog\/bhda-finishing-tips-and-techniques-support-and-nub-removal","title":{"rendered":"BHDA Finishing Tips and Techniques: Support and Nub Removal"},"content":{"rendered":"

BHDA \u2014 or black high definition acrylate<\/a> has amazing detail, finish, durability, and color. It also has something that’s pretty unusual for Shapeways prints: Models are printed with support structures. Until recently, we removed the supports from all models during post-processing in our factory. But, this went beyond what many of our creators wanted. So, to give you more flexibility around the way your models look, you now have the option to receive your BHDA models with supports still attached. Below, we’ll show you how to finish your models to remove the tiny nubs that remain after support removal, and, if you’re the kind of creator who likes to DIY the post-process, we’ll show you how to remove supports.<\/p>\n

LEARN MORE ABOUT BHDA<\/a><\/p>\n

\"IMG_0242.JPG\"<\/a>

The USS Arkansas 1\/1800 model by C.O.B. Constructs and Miniatures with supports and after support removal<\/p><\/div>\n

TECHNIQUES<\/em><\/h3>\n

Nub Removal \u00a0<\/strong>
\nOnce the large supports have been removed, small nubs will remain.<\/em><\/h3>\n

Nubs can be easily removed with tweezers, \u2265 600 grit sandpaper, and mineral oil. The tweezers are used to scrape off the larger nubs.<\/p>\n

CAUTION:<\/em> Be careful not to add excess pressure as this material can easily scratch. Cosmetic scratches can be removed, but deep scratches will need additional buffing.<\/p>\n

\u2265 600 grit sandpaper should gently rub off the remaining nubs. This should take just a few swipes back and forth to notice the nubs disappearing. This material, although strong, does polish quickly. Double check while you are polishing you are not rounding sharp edges or losing details while sanding.<\/p>\n

\"IMG_0262.JPG\"<\/a>

USS Arkansas 1\/1800 model by C.O.B. Constructs and Miniatures<\/p><\/div>\n

Left side before polishing \/ right side after sanding for 1 minute with mineral oil<\/p>\n

Final Finishing Step<\/strong>
\nOnce you have sanded off those final nubs and are left with a smooth surface, a few small white marks from the tools may remain. This is where the mineral oil or lotion comes in. These can be gently painted on the material to moisturize and remove the superficial scratches and scrapes.<\/p>\n

\"IMG_0255.JPG\"<\/a>

With all supports removed<\/p><\/div>\n

 <\/p>\n

TRY IT NOW<\/a><\/p>\n

\"A<\/a>

Ill Gotten Games’ Elf Ranger shown with supports and after support removal<\/p><\/div>\n

Large Support Removal<\/strong>
\nTIP: Check the 3D file to avoid removing crucial parts of the model.<\/em><\/h3>\n

If your model has many wiry parts or fragile overhangs, it is best to use snippers to remove these supports. This will help to protect the model. When you have a wall that meets many supports, tweezers or metal spatulas may be used to remove multiple supports at one time. You can angle the tweezers or the spatula flush against the wall of the model and pull downward. This will \u201cunzip\u201d the supports from the actual structure. Ensure you are careful with the spatula as this can cause unintentional gashes.<\/p>\n

How to hand-finish your products:<\/strong>
\nInitial Finishing Tools<\/em>
\n\"IMG_0236.JPG\"<\/p>\n

    \n
  1. Snippers:<\/strong> Cut off supports<\/li>\n
  2. Craft Spatula:<\/strong> Scrape off supports<\/li>\n
  3. Tweezers:<\/strong> Pull off supports and scraping off nubs<\/li>\n<\/ol>\n

    Final Finishing Tools<\/em>
    \n\"IMG_0237.JPG\"<\/p>\n

      \n
    1. \u2265 600 grit sandpaper: sand off nubs<\/li>\n
    2. Paint brush: apply finishing lotion or mineral oil<\/li>\n
    3. Mineral oil or lotion: moisturize material to remove scratches<\/li>\n<\/ol>\n

       <\/p>\n

      But, why does this material even have supports and nubs?<\/h3>\n

      Supports and nubs exist due to the production process. Before printing the model, the 3D printing engineers will check the model to make sure it will make it through the production process. Next, support structures are added to the design file using a variety of pre-set supports which are selected based on your model\u2019s geometry. If your design is particularly intricate, individual supports are added to delicate areas. These support structures hold the model to the build plate while they are printing, while offering strength to the product as it’s being printed. Once the models have had the supports added and are oriented in the build, the production team will load the models to the printer. The printers use direct light projection (DLP) technology, which includes a liquid resin, and light to cure the material. Each build is created layer by layer using light voxels to cure the resin to the previous layer.<\/p>\n

      YOU’RE READY!
      \nPRINT IN BHDA<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

      BHDA \u2014 or black high definition acrylate has amazing detail, finish, durability, and color. It also has something that’s pretty…<\/p>\n","protected":false},"author":80,"featured_media":29392,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[510],"tags":[555,1520,1521,1522,1523,479],"class_list":["post-27473","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-3d-printing-industry","tag-3d-printing","tag-bhda","tag-black-high-definition-acrylate","tag-finishing-techniques","tag-nub-removal","tag-3-tutorials"],"thumbnail":"https:\/\/www.shapeways.com\/blog\/wp-content\/uploads\/2016\/10\/blog-bhda-w-supports-625x468.jpg","yoast_head":"\nBHDA Finishing Tips and Techniques: Support and Nub Removal - Shapeways Blog<\/title>\n<meta name=\"description\" content=\"BHDA \u2014 or black high definition acrylate has amazing detail, finish, durability, and color. 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