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Yes, I have a jug of SPR955 that is a couple of years past expiry. It has been kept refrigerated and decanted in 300ml amounts (after warming to room temp) for decanting to users ... and is working fine.</div>
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Howard</div>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> Demis D. John <demis@ucsb.edu><br>
<b>Sent:</b> Wednesday, June 21, 2023 6:42 PM<br>
<b>To:</b> Howard Northfield <Howard.Northfield@uottawa.ca><br>
<b>Cc:</b> Price, Aimee <price.798@osu.edu>; labnetwork@mtl.mit.edu <labnetwork@mtl.mit.edu>; Ramsey, Keith <ramsey.435@osu.edu><br>
<b>Subject:</b> Re: [labnetwork] Alternative distributor for SPR 955?</font>
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<div style="font-size:9pt; font-family:'calibri'; color:#FF4233"><b>Attention : courriel externe | external email</b></div>
<div>We have got the “extension of expiration” notices from manufacturer, and have done internal tests showing these PR’s work well beyond the expiration dates (when bulk is stored in refrigerator) - they appear to be good at least 1 year beyond expiration.
We tested UV6, UVN30, and one of the SPR’s if I remember correctly.
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<div><span class="x_Apple-style-span" style="">-- Demis</span></div>
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<blockquote type="cite">On Jun 21, 2023, at 16:07, Howard Northfield <Howard.Northfield@uottawa.ca> wrote:<br>
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I am pretty much now used to getting materials only months from expiry from all sources.</div>
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<div class="x_ContentPasted0">Howard Northfield</div>
<div class="x_ContentPasted0">Research Associate</div>
<div class="x_ContentPasted0">Advanced Research Complex (ARC)</div>
University of Ottawa<br>
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<div id="x_divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" color="#000000" style="font-size:11pt"><b>From:</b> labnetwork <labnetwork-bounces@mtl.mit.edu> on behalf of Price, Aimee <price.798@osu.edu><br>
<b>Sent:</b> Tuesday, June 20, 2023 9:50 PM<br>
<b>To:</b> labnetwork@mtl.mit.edu <labnetwork@mtl.mit.edu><br>
<b>Cc:</b> Ramsey, Keith <ramsey.435@osu.edu><br>
<b>Subject:</b> [labnetwork] Alternative distributor for SPR 955?</font>
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<div style="font-size:9pt; font-family:'calibri'; color:#FF4233"><b>Attention : courriel externe | external email</b></div>
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<p class="x_x_MsoNormal">Dear Labnetwork,</p>
<p class="x_x_MsoNormal">Does anyone purchase SPR 955 (or any other Shipley/Dupont products) from a distributor other than Kayaku? We have had numerous issues with different materials. In this case, we need to either find a different distributor or begin
qualifying another resist, probably both. The current issue is that we purchased a gallon of SPR955 which was “in stock.” It arrived last week with an expiration date of 7/8/23. Kayaku’s response was that they were required to ship what they had on hand
first and would ask for an extension to the expiration date from the manufacturer. I am still hoping for a better response and solution than that but need to find an alternative in the meantime.</p>
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<p class="x_x_MsoNormal">If anyone works with a different distributor for Shipley resists, I’d love to hear your experience. I’ll share the final solution from Kayaku and summarize any responses for alternatives.</p>
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<p class="x_x_MsoNormal">Thank you,</p>
<p class="x_x_MsoNormal">Aimee Bross Price</p>
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<p class="x_x_MsoNormal"><span style="">Manager, Nanofabrication</span></p>
<p class="x_x_MsoNormal"><span style="">The Ohio State University </span></p>
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<p class="x_x_MsoNormal"><span style="color:#C00000"><a href="mailto:Price.798@osu.edu"><span style="color:#C00000">Price.798@osu.edu</span></a></span></p>
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