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        <title>... UV-resin shelf-life more than 10 years !!</title>
        <description> Hi all,

some 10+ years ago I&#039;ve received a bottle of experimental UV-resin from Fernando (spota) -- found the bottle in the basement and it was still fluid.

So tested it with &quot;standard setting&quot;, same as for a common white resin (in the last image) -- looks like perfect prints! ... after 10 years in the basement (with broken cap) :)-D

[attachment 113143 AltesResin1-abtropfend.jpg]  [attachment 113144 AltesResin3-fertig.jpg]


... here the white resin (with a printing error):

[attachment 113145 WeissesResin-Fehldruck.jpg]</description>
        <link>https://reprap.org/forum/read.php?184,861631,861631#msg-861631</link>
        <lastBuildDate>Wed, 13 May 2026 00:07:02 -0400</lastBuildDate>
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        <item>
            <guid>https://reprap.org/forum/read.php?184,861631,880948#msg-880948</guid>
            <title>Re: ... UV-resin shelf-life more than 10 years !!</title>
            <link>https://reprap.org/forum/read.php?184,861631,880948#msg-880948</link>
            <description><![CDATA[ ... and here again in direct comparison - printed on the left with an Objet (40k€), on the right with the Elegoo Mars (0.2k€) with the 12+ years old resin B)-<br />
<br />
[attachment 117551 Stanford-BunnyVoronoi2bVergleich_kl.jpg]]]></description>
            <dc:creator>VDX</dc:creator>
            <category>Polymer Working Group</category>
            <pubDate>Wed, 27 Jan 2021 02:37:52 -0500</pubDate>
        </item>
        <item>
            <guid>https://reprap.org/forum/read.php?184,861631,863439#msg-863439</guid>
            <title>Re: ... UV-resin shelf-life more than 10 years !!</title>
            <link>https://reprap.org/forum/read.php?184,861631,863439#msg-863439</link>
            <description><![CDATA[ Okay. Alright. Shall try that!]]></description>
            <dc:creator>12345lance</dc:creator>
            <category>Polymer Working Group</category>
            <pubDate>Sun, 01 Dec 2019 04:08:47 -0500</pubDate>
        </item>
        <item>
            <guid>https://reprap.org/forum/read.php?184,861631,863428#msg-863428</guid>
            <title>Re: ... UV-resin shelf-life more than 10 years !!</title>
            <link>https://reprap.org/forum/read.php?184,861631,863428#msg-863428</link>
            <description><![CDATA[ ... it's a decent chemistry to find the correct formula for higher UV wavelengths above 300nm! - so search for 405nm "photo-initiators" available for private use ...]]></description>
            <dc:creator>VDX</dc:creator>
            <category>Polymer Working Group</category>
            <pubDate>Sat, 30 Nov 2019 19:39:42 -0500</pubDate>
        </item>
        <item>
            <guid>https://reprap.org/forum/read.php?184,861631,863425#msg-863425</guid>
            <title>Re: ... UV-resin shelf-life more than 10 years !!</title>
            <link>https://reprap.org/forum/read.php?184,861631,863425#msg-863425</link>
            <description><![CDATA[ Its a 3D printer! it emits at 405nm! My other store bought resins work, but my home brew  one doesn't!<br />
<br />
<br />
and I did follow the recipe to a point,  Does Benzoin Isobutyl Ether work at 405nm?]]></description>
            <dc:creator>12345lance</dc:creator>
            <category>Polymer Working Group</category>
            <pubDate>Sat, 30 Nov 2019 17:25:47 -0500</pubDate>
        </item>
        <item>
            <guid>https://reprap.org/forum/read.php?184,861631,863424#msg-863424</guid>
            <title>Re: ... UV-resin shelf-life more than 10 years !!</title>
            <link>https://reprap.org/forum/read.php?184,861631,863424#msg-863424</link>
            <description><![CDATA[ ... my DLP-printer has 405nm-LED's which shine through a "mobile phone"-display -- whicht type is your "LCD machine"? - does it emit 405nm?]]></description>
            <dc:creator>VDX</dc:creator>
            <category>Polymer Working Group</category>
            <pubDate>Sat, 30 Nov 2019 17:04:03 -0500</pubDate>
        </item>
        <item>
            <guid>https://reprap.org/forum/read.php?184,861631,863423#msg-863423</guid>
            <title>Re: ... UV-resin shelf-life more than 10 years !!</title>
            <link>https://reprap.org/forum/read.php?184,861631,863423#msg-863423</link>
            <description><![CDATA[ ... could be, your LCD has an UV-filter, which blocks the needed UV wavelength ...]]></description>
            <dc:creator>VDX</dc:creator>
            <category>Polymer Working Group</category>
            <pubDate>Sat, 30 Nov 2019 17:01:06 -0500</pubDate>
        </item>
        <item>
            <guid>https://reprap.org/forum/read.php?184,861631,863422#msg-863422</guid>
            <title>Re: ... UV-resin shelf-life more than 10 years !!</title>
            <link>https://reprap.org/forum/read.php?184,861631,863422#msg-863422</link>
            <description><![CDATA[ Wow that is so great!<br />
<br />
I did get around to procuring all the materials for the resin, but I just can't get it to cure in my 3D printer! (Its an LCD machine)<br />
But it does cure in the UV lamp I have, just not in the printer! <br />
Any idea why?]]></description>
            <dc:creator>12345lance</dc:creator>
            <category>Polymer Working Group</category>
            <pubDate>Sat, 30 Nov 2019 16:56:33 -0500</pubDate>
        </item>
        <item>
            <guid>https://reprap.org/forum/read.php?184,861631,862423#msg-862423</guid>
            <title>Re: ... UV-resin shelf-life more than 10 years !!</title>
            <link>https://reprap.org/forum/read.php?184,861631,862423#msg-862423</link>
            <description><![CDATA[ ... search at Amazon for "elegoo resin" -- should be much easier ...]]></description>
            <dc:creator>VDX</dc:creator>
            <category>Polymer Working Group</category>
            <pubDate>Wed, 13 Nov 2019 14:41:19 -0500</pubDate>
        </item>
        <item>
            <guid>https://reprap.org/forum/read.php?184,861631,862420#msg-862420</guid>
            <title>Re: ... UV-resin shelf-life more than 10 years !!</title>
            <link>https://reprap.org/forum/read.php?184,861631,862420#msg-862420</link>
            <description><![CDATA[ That's really impressive, it's the first time i've seen photos of a printed object with handmade UV-resin<br />
<br />
I remember reading many times that post<br />
As Fernando (spota) says in this <a href="https://reprap.org/forum/read.php?70,10142" target="_blank" >Link (2008) </a> the chemicals and recipe are:<br />
<br />
Per 100g of UV-curing resin:<br />
3g of Benzil CAS: 134-81-6 <br />
1g of Benzoilisobutylether (BIsoBE) CAS: 119-61-9<br />
1g of MDEA CAS: 105-59-9<br />
0.5g of EDTA (CAS: 60-00-4, 150-43-6) or 0.1g of Hydrochinone (CAS: 123-31-9)<br />
complete to 100g with Polyester resin.<br />
<br />
I've put CAS numbers on last two.<br />
<br />
First i need to start building my FDM printer before an incursion into SLA, but i'm afraid that i'm not sure that i can get all the chemicals here (Argentina) i need to send some emails to suppliers before trying.<br />
<br />
Also <a href="https://hackaday.com/2013/10/09/3d-printering-you-want-uv-resin/#comment-1072043" target="_blank"  rel="nofollow">This comment</a> says something about buying from hong kong these chemicals, i wonder if someone tried that]]></description>
            <dc:creator>Ari_yo</dc:creator>
            <category>Polymer Working Group</category>
            <pubDate>Wed, 13 Nov 2019 14:01:57 -0500</pubDate>
        </item>
        <item>
            <guid>https://reprap.org/forum/read.php?184,861631,861640#msg-861640</guid>
            <title>Re: ... UV-resin shelf-life more than 10 years !!</title>
            <link>https://reprap.org/forum/read.php?184,861631,861640#msg-861640</link>
            <description><![CDATA[ ... this clear resin needs some percents more UV-curing time per slice than the white one -- not all fine details survived:<br />
<br />
[attachment 113150 MoonCity.jpg]]]></description>
            <dc:creator>VDX</dc:creator>
            <category>Polymer Working Group</category>
            <pubDate>Thu, 31 Oct 2019 04:45:48 -0400</pubDate>
        </item>
        <item>
            <guid>https://reprap.org/forum/read.php?184,861631,861631#msg-861631</guid>
            <title>... UV-resin shelf-life more than 10 years !!</title>
            <link>https://reprap.org/forum/read.php?184,861631,861631#msg-861631</link>
            <description><![CDATA[ Hi all,<br />
<br />
some 10+ years ago I've received a bottle of experimental UV-resin from Fernando (spota) -- found the bottle in the basement and it was still fluid.<br />
<br />
So tested it with "standard setting", same as for a common white resin (in the last image) -- looks like perfect prints! ... after 10 years in the basement (with broken cap) :)-D<br />
<br />
[attachment 113143 AltesResin1-abtropfend.jpg]  [attachment 113144 AltesResin3-fertig.jpg]<br />
<br />
<br />
... here the white resin (with a printing error):<br />
<br />
[attachment 113145 WeissesResin-Fehldruck.jpg]]]></description>
            <dc:creator>VDX</dc:creator>
            <category>Polymer Working Group</category>
            <pubDate>Wed, 30 Oct 2019 17:01:02 -0400</pubDate>
        </item>
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