Archive

Posts Tagged ‘burnout’

From the mistakes we learn…

January 7th, 2012 No comments

Happy Holidays!

Finally have some time to write in the build log.

Fernando (SpaceCaptain)  from the Yahoo group was king to send me small samples of different resins (4 ) before the holidays. I had tested mixing them and Dymax 9663 with Castin’ Craft Transparent Amber and here are the results:

 

The problem I discovered is that not one of the resins was able to cure to a layer less than 0.5mm even at 0.5 seconds cure time. Either my projector is too powerful or the dye is not opaque enough. Also the Dymax did not like a high dye content – it could not cure to a solid like – only to uncured silicone consistency.

The mini VATs I cleaned by polymerizing the resin left inside with a full blast of all white and Isopropyl alcohol. No ill effects.

I did find one good thing – The 2505 burns out with only sooth left:

Before and after ( the wire is a AWG24 )

I have thought of using the used or fresh yellow (brighter one ) toner from a Xerox machine:

It did not work because it was filled with some Ferric particles and the pigment did not get distributed evenly ( they are Synthetic Wax ).

And finally some more random pics:

 

Hope it is of some use to you.

Cheers!

 

What Will Happen If I…

November 11th, 2011 2 comments

I know you have asked yourselves this question and the answer resulted usually you ended up in trouble, but maybe not this time.

I decided to check whether the polymerized resin will burn out or melt for casting purposes. I placed some Teflon film ( yes, I have it and will post about it ) on the Ceramic stove top burner. Placed the screw with a blob of resin and raised the temperature slowly.  @100 C -  I saw no change in the Teflon film other that it went soft, but it kept its properties. @120 C, 130 C, 150 C, 180 C, 200 C, same thing except the resin started to get soft when in contact with the teflon film. I broke a piece of the resin and set it on top of the film. Raised to 250 C – the teflon kind of melted and adhered to the ceramic( but was not hard to damage it by moving the piece of resin around ) and the resin started to change color to deep yellow.

Up to 300 C and the teflon is still holding and repelling the resin from ruining my ceramic counter top:

@380 – 400 I gave up since the resin changed color to almost black and no melting has occurred – it stayed the blob shape that I originally broke off.

Scraping the teflon with a putty knife made it into white plastic -like shavings.  It protected the stove top even at the higher temperatures so well that :

 

My wife is never going to know or suspect anything like the above ever happened in the kitchen!

Cheers!

 

Categories: Resin Tags: , , , , ,