A cause of crazing of acrylic can be if it was flame polished before assembly and also the action of the solvent on the joints.It can be a slow process or quite rapid in time depending on the type of solvent glue used. The air bubbles are caused by micro imperfections in the joint that at first don't seem visible due to the freshness of the joint but appear with age.If a joint is inspected with a magnifying glass these are visible even when new.
On Saturday, December 29, 2018 at 3:43:41 PM UTC, Nick wrote: > > Hmmm. Thanks John. > > It's the original cover, so I'll preserve it, but it's definitely > suffering. I may get another made using the original as a template. Not > only is there crazing, but the joints are weakening - it looks like there > are bubbles in them... > > Cheers > > Nick > > On Saturday, 29 December 2018 11:10:55 UTC, Nixcited delighted wrote: >> >> >> > On 29 Dec 2018, at 05:24, Nick <> wrote: >> > >> > The acrylic cover of my NixieSat is starting to break down (crazing), >> probably due to UV, which would be odd as it's never been in direct >> sunlight... >> > >> > The joints are going too... >> > >> > Nick >> >> Cast acrylic cracks more than extruded. I’ve had cast acrylic instantly >> craze using some quite mild solvents. Your problems may be down to >> plasticisers within the material leaching out and it becoming brittle as a >> result. >> >> John S > > -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send an email to [email protected]. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/07746882-3cef-445a-be6e-5521ca3b4f1c%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
