Vitrite

<h2 id="process">Process</h2>
<p>To make the electric lamp, molten vitrite is poured into the shell up to a height of approximately a quarter inch (6 millimeters).  A plunger is brought down to force the plastic glass into shape and fix the contacts.
</p>
<h2 id="composition">Composition</h2>
<p>Vitrite is referred to as glass but in fact it is an <a href="/facts/Vitreous_enamel/gjfb1hA8">enamel</a> which contains a high proportion of <a href="/facts/Lead_(II)_oxide/ekk8cog0">lead (II) oxide</a> to give fluidity, and considerable quantities of <a href="/facts/Manganese_oxide/JVJzfrjn">manganese oxide</a> to produce a black colour.
</p>

<h2 id="references">References</h2>

<ol>
<li id="fn:1"><p>"'Vitrite' holders for incandescence lamps", Electrical Review, vol. 16, no. 378, p. 165, 21 February 1885. <a href="https://books.google.com/books?id=ikA_AQAAMAAJ&pg=PA165" target="_blank">https://books.google.com/books?id=ikA_AQAAMAAJ&pg=PA165</a> <a href="#fnref:1" class="footnote-back-ref">↩</a></p></li>
<li id="fn:2"><p>Official Journal of the European Communities: Information and notices, vol. 41, Issues 287-291, p. 173, Office for Official Publications of the European Communities, 1998 <a href="#fnref:2" class="footnote-back-ref">↩</a></p></li>
</ol>

Vitrite open-in-new

Vitrite