[Ronja] Sealant reaction...

[Karel Kulhavy]

On Mon, Apr 09, 2007 at 11:04:51PM +0200, Gyurkó Martin wrote:
> Hi Everybody!
> 
> I sealed about 10 months ago a lens into a PVC tube with a transparent 
> silicon sealant.
> I did not have time, and forgot the whole project in my craftsroom. 
> Dark, normally tempered, with low humidity.
> Now I found it with a shocking result:
> 
> http://atomblitz.uw.hu/

That's interesting. Didn't the plastic pipe have traces of oil or grease?  The
tube is not PVC but probably polypropylene (PP-H) by the label? Are you sure
you used transparent sealant and not brown? Also, was the sealant the acidic
(smelly) one or the neutral silicon?

Turning brown doesn't matter for Ronja function but falling off does. However
plastic pipes must not be used anyway because of fire hazard so I don't think
it makes sense to investingate this as a bug and fix it in the guide :/

CL<
> 
> The sealant turned brown, and it also detached from the PVC pipe.
> Maybe a chemical reaction, but i have never seen this kind before.
> I made pictures of all the used materials.
> 
> Did anyone have similar results?
> 
> Bye
> Martin
> 
> -- 
> Twibright Ronja mailing list http://ronja.twibright.com
> Ronja at lists.pointless.net
> http://pointless.net/mailman/listinfo/ronja