On Tue, Sep 26, 2017 at 12:21 AM, Ed Sharpe via cctalk < cctalk@classiccmp.org> wrote:
> we see this same effect in large studio cameras on board monitors they > have. we have just left as us as the large all tube innards do not work > alas.... Ed# > > Sent from AOL Mobile Mail > > On Monday, September 25, 2017 Ian S. King <isk...@uw.edu> wrote: > > On Mon, Sep 25, 2017 at 10:37 AM, <couryho...@aol.com> wrote: > > Folks - Any idea what causes the screen rot? > > > > also any preventative measures to keep it from happening or spreading? > > Ed# > > > It's the understood chemical decomposition of the adhesive that holds the > screen shield to the CRT. It's pretty much inevitable, from what I > understand. The solution is to separate the shield from the CRT, clean the > face of the CRT and reattach the shield. Some people don't reattach it, > and some people think they are risking serious injury - no opinion. Will > the newer adhesives hold up better? We hope so. -- Ian > > -- > > Ian S. King, MSIS, MSCS, Ph.D. Candidate > The Information School > > A common trick amongst TV collectors with the large 23" round CRTs is to carefully remove the tube and place it face down in a kiddy pool of lukewarm water. Let it sit an hour or two in the sun and the faceplate will slide right off. To re-adhere the glass after cleaning, one technique is to use double sided foam tape on the face around the perimeter; similar thickness to the original PVA and holds well, especially if under slight compression once the tube is reinstalled. -C
