RE: Colour STL file format

Date: Tue Jun 10 2003 - 16:27:42 EEST

Dear Richard,

You're right, each facet has an RGB-code. We have 2 bytes, so 5 bits a color
+ 1 bit indicating if the traingle color is applied or not.

Please find the complete description of the STL-color format used by
Materialise at following link:


Pieter Bourgaux

Application engineer

Tel +32 16 39 66 66
Fax +32 16 39 66 00

No time to fix a file ? does it for you !
On-line around the clock STL repair and CAD to STL conversion.
"No cure, money back" guarantee.

-----Original Message-----
From: Bibb, Richard (PDR) []
Sent: Tuesday, June 10, 2003 2:11 PM
To: RP Mailing list (E-mail)
Subject: Colour STL file format

Dear List,

Could anyone please inform me of the correct format for colour STL files. I
understand the traditional STL format and understand that the colour is
assigned to each facet as an RGB value but I would like to ensure that I
have it correct so that any files I produce will work with existing

many thanks in advance.

Dr. Richard Bibb
Western Avenue
United Kingdom

Tel. +44 (0) 29 2041 6723
Fax. +44 (0) 29 2041 6973

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