Talk Composites - The Forum for Advanced Composites

How to get matte finish on a mold?

http://www.talkcomposites.com/Topic32154.aspx

By quinn - 2/25/2019 5:22:55 PM

Is it possible to get a nice consistent matte on a mold surface with abrasives? Maybe sand to 3000 or 4000? Steel wool? Any other options? Also if doing this, will mold be more sensitive to sticking prepreg parts (using frekote). 
Second question, what about prepreg matte carbon fiber sheets? Would normally use plates of glass. I've seen glass with a matte looking finish, but can't find it when searching for matte glass. Not sure what it would be called, or if there's a different material that should be used. 
By HansenJC - 3/1/2019 7:32:10 PM

 
quinn - 2/25/2019 5:22:55 PM
Is it possible to get a nice consistent matte on a mold surface with abrasives? Maybe sand to 3000 or 4000? Steel wool? Any other options? Also if doing this, will mold be more sensitive to sticking prepreg parts (using frekote). 
Second question, what about prepreg matte carbon fiber sheets? Would normally use plates of glass. I've seen glass with a matte looking finish, but can't find it when searching for matte glass. Not sure what it would be called, or if there's a different material that should be used. 


I have done more searching and found this photo of a carbon fiber car body that has been soda blasted. What this made me realize is that the carbon strands themselves are shiny and can be seen in this photo. This makes me think the only way to get 
"Matte" finish may be to apply it as a final coating just like any other paint.

http://nutechsodablasting.com/gallery/74643.jpg
Soda Blasted shell