Editing Cathode-ray tube (section)

====Size====
[[File:Top of Sony PVM-4300 (KX-45ED1) with cat.jpg|alt=Top view of Sony PVM-4300 with calico cat for scale|thumb|Top view of [[Sony PVM-4300]] with calico cat for scale]]
A practical limit on the size of a CRT is the weight of the thick glass needed to safely sustain its vacuum,<ref>{{Cite web|url=https://www.repairfaq.org/samnew/tvfaq/tvaffpv.htm|title=SER FAQ: TVFAQ: Arcing from flyback or vicinity|website=www.repairfaq.org}}</ref> since a CRT's exterior is exposed to the full atmospheric [[pressure]], which for instance totals {{Convert|5800|lbf|N|lk=on}} on a 27-inch (400&nbsp;[[Square inch|in<sup>2</sup>]]) screen.<ref>{{Cite patent|country=US|number=2874017A|title=Prevention of fracture in glass cathode-ray tubes|url=https://patents.google.com/patent/US2874017A/en}}</ref> For example, the large 43-inch [[Sony PVM-4300]] weighs {{Convert|440|lb|kg|lk=on|abbr=on|disp=or}},<ref>{{Cite web|url=https://www.theverge.com/2018/2/6/16973914/tvs-crt-restoration-led-gaming-vintage|title=Inside the desperate fight to keep old TVs alive|first=Adi|last=Robertson|date=February 6, 2018|website=The Verge}}</ref> much heavier than 32-inch CRTs (up to {{convert|163|lb|kg|abbr=on|disp=or}}) and 19-inch CRTs (up to {{convert|60|lb|kg|abbr=on|disp=or}}). Much lighter flat panel TVs are only ~{{convert|18|lb|kg|abbr=on}} for 32-inch and {{convert|6.5|lb|kg|abbr=on}} for 19-inch.<ref>{{cite web |url=https://www.cpsc.gov/s3fs-public/pdfs/TV-hazard-report-January2015.pdf |archive-url=https://web.archive.org/web/20170125124729/https://www.cpsc.gov/s3fs-public/pdfs/TV-hazard-report-January2015.pdf |archive-date=2017-01-25 |url-status=live |title= TVS -Tipping the Scale to Safety |date=2015 |website=www.cpsc.gov |access-date=2020-12-11}}</ref>

Size is also limited by anode voltage, as it would require a higher dielectric strength to prevent [[arcing]] and the electrical losses and ozone generation it causes, without sacrificing image brightness.

Shadow masks also become more difficult to make with increasing resolution and size.<ref name="auto97" />