Page 2 of 2 FirstFirst 12
  1. #11
    With a bit of Internet searching……
    .
    How to tell whether its extruded or cast:
    "Burn a piece , extruded burns silently and will drip molten balls , cast burns with a crackly/smokey flame and wont drip. "
    .
    "Another point worth mentioning is that extruded stinks when it's cut but cast has an almost sweet smell."
    .
    And on this forum, from John S in Feb 2013
    .
    "Extruded has white backing on one side and clear on the other.
    Cast has clear backing on one side and white on the other."
    .
    .
    Personally, I would only trust John.
    Last edited by cropwell; 07-07-2014 at 01:56 PM.

  2. #12
    Quote Originally Posted by cropwell View Post
    How to tell whether its extruded or cast:
    "Burn a piece , extruded burns silently and will drip molten balls , cast burns with a crackly/smokey flame and wont drip. "
    .
    "Another point worth mentioning is that extruded stinks when it's cut but cast has an almost sweet smell."
    Both are true but I'd say the sound is more a Sizzling that crackling sound. The smell is definately sweet smelling.

    Quote Originally Posted by cropwell View Post
    And on this forum, from John S in Feb 2013
    .
    "Extruded has white backing on one side and clear on the other.
    Cast has clear backing on one side and white on the other."
    .
    .
    Personally, I would only trust John.
    You do realise John's favorite pass time was taking the Piss.!!
    Last edited by JAZZCNC; 07-07-2014 at 02:37 PM.

  3. #13
    Quote Originally Posted by JAZZCNC View Post
    You do realise John's favorite pass time was taking the Piss.!!
    Who'd a thunk it. - Yes, I realise what the man is about, but I respect his opinion as an engineer.

  4. Quote Originally Posted by Dwayne Dibbley View Post
    Can you easily tell if the acrylic is cast or extruded by looking at it? ( no it does not have a label on it :) )

    Thanks
    Normally Cast has a white film on it and extruded has a clear film on it. Notice I say normally, I have seen otherwise on more than one occasion. That and ask for cast only when you buy it. Be careful though as some will say it is cast over the phone and you will get extruded. -Michael
    CAD software Shark Pro v10, Also Aspire v9.0
    CAM Software Aspire v9.0, CamBam v1 beta12
    CNC Machine: http://www.mycncuk.com/threads/3661-...Second-machine
    3D printers: 2 x Prusa MK2S soon to be 2.5's and 1 x mini Delta (180 x 180)
    Work with Solid Surfaces, Acrylics, Woods, Foamboard, PLA, ASA, PMMA
    Work Computer: Lenovo D20, K4000, Tesla C2070, 64GB RAM

    www.marino-customs.com

  5. #15
    OK I have burnt a piece last night, it was silent burning so could be extruded it also has a clear cover on it so would also point it as extruded.

    I have ordered some 12mm cast to see if i get a different result.

    Thanks

  6. Looking at some cut pieces of both here in the shop I noticed that clear cast has no colour to it and extruded has a bluish tint to it as indirect light hits them. Don't know if this is always the case but just noticed it while looking over shoulder at the cut pile of pieces for machining. Michael
    CAD software Shark Pro v10, Also Aspire v9.0
    CAM Software Aspire v9.0, CamBam v1 beta12
    CNC Machine: http://www.mycncuk.com/threads/3661-...Second-machine
    3D printers: 2 x Prusa MK2S soon to be 2.5's and 1 x mini Delta (180 x 180)
    Work with Solid Surfaces, Acrylics, Woods, Foamboard, PLA, ASA, PMMA
    Work Computer: Lenovo D20, K4000, Tesla C2070, 64GB RAM

    www.marino-customs.com

Page 2 of 2 FirstFirst 12

Similar Threads

  1. Acrylic Cutting Help
    By Tenson in forum Machine Discussion
    Replies: 26
    Last Post: 08-11-2016, 08:15 PM
  2. Acrylic or mdf I can cnc
    By rainboweyes in forum Opportunities Available & Sought
    Replies: 0
    Last Post: 19-02-2013, 02:09 AM
  3. Drilling Acrylic with CamBam
    By m.marino in forum Machine Discussion
    Replies: 2
    Last Post: 06-06-2012, 04:45 PM
  4. Which end mill to level my acrylic bed?
    By HankMcSpank in forum Tool & Tooling Technology
    Replies: 18
    Last Post: 03-02-2012, 02:57 PM
  5. Acrylic suppliers
    By Web Goblin in forum General Discussion
    Replies: 2
    Last Post: 24-10-2011, 09:11 PM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •