[TCML] Colour of G10
quarkster at att.net
Tue Apr 22 23:00:51 MDT 2008
The glass fiber reinforcement is essentially colorless. The color of G10 composite comes from the epoxy resin. G10 color varies from manufacturer to manufacturer, and ranges from a yellowish-tan to pale green. The color of the uncured epoxy resin an be quite different from the final cured state. G10 and the familiar FR4 printed circuit board material are nearly identical, the FR4 having a fire-retardant added to the epoxy. G11 and FR5 are another grade of glass/epoxy composite that have a higher operating temperature than G10/FR4, and range in color from a yellow-green to pale amber. All these materials can be obtained in other colors on special order. Some companies fabricate prototype or experimental PCBAs using red FR-4 so there is no chance that an experimental PCBA will "accidentally" get shipped in a production product.
DC Cox <resonance at wildblue.net> wrote:
The laminated material is glass fibers, hence the green color. The G in
G-10 stands for "glass" laminate.
On Tue, Apr 22, 2008 at 3:14 PM, Marina Moudrak wrote:
> Hello all,
> I would like to ask you all a question regarding G-10 laminate.
> I wonder how G-10 becomes light green in colour? An epoxy resin used for
> G-10 is yellow, the standard colour should be yellowish, if I am right.
> What kind of technology gives this light green colour and for what reason?
> Thank you,
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