Good morning Arnaud, A Happy New Year to you as well. An angry auditor is a hard person to convince. Both of the methods that you listed in links involve the use of solvents to transfer potential contaminants to a test substrate for analysis. I have not worked with either company, but did look over their material in the links. The Henniker site shows their kit, which I perceive to be a kit where you use acetone to wash a surface, capture it on the slide, then try to coat the slide with an acrylic coating. If no silicone, good coating, if silicone is there, you would get dewetting. The Henniker site also shows other methods, like water drop contact angle or dyne pens as a quick method for testing surfaces. The Anderson site uses XPS to determine the presence or absence of silicones. Probably much more accurate, but also more expensive. Do you have access to FTIR (Fourier Transform InfraRed) spectroscopy? If so, that would be my method of choice. If not, I would go the route of dyne pens. *Douglas Pauls *| Principal Materials and Process Engr | Advanced Operations Engineering *COLLINS AEROSPACE* 400 Collins Road NE, MS 108-101, Cedar Rapids, IA 52498 USA *Tel:* +1 319 295 2109 | *Mobile: *+1 319 431 3773 [log in to unmask] [log in to unmask] for all Export Compliant Items On Tue, Jan 7, 2020 at 8:00 AM GRIVON Arnaud <[log in to unmask]> wrote: > Happy New Year TechNet ! > > Here is a first query for 2020... > > We all know about the need of carefully segregate acrylic/urethane from > silicone conformal coatings, but how about evidencing and demonstrating > (say for an angry auditor) the actual lack of silicone cross-contamination > on toolings, ovens and workspaces ? > > Are you aware of any reliable test system to perform silicone > contamination evaluations? What are their principles and related test > methods & acceptance criteria? > > It looks like some suppliers offer Surface Silicone Contamination Test > Kits : > > - Henniker Plasma< > https://urldefense.proofpoint.com/v2/url?u=https-3A__plasmatreatment.co.uk_wp-2Dcontent_uploads_2016_09_Henniker-2DPlasma-2DTechnology-2DOverview.pdf&d=DwIFAg&c=ilBQI1lupc9Y65XwNblLtw&r=lTRDjB8ojaf7ZaJ9DHeDAm7e-HFP9fxIkv6fRnV49HE&m=LT539hVXxb8UbjwuyFEu8LY-HOgcCuY1mHRf-oEupas&s=Lw-bgVGPQYxZcuA29tfr_xRR63jB1vgPXu-WaT9l624&e= > > : > https://urldefense.proofpoint.com/v2/url?u=https-3A__plasmatreatment.co.uk_henniker-2Dplasma-2Dtechnology_products_surface-2Dtest-2Dequipment_test-2Dfor-2Dsurface-2Dsilicone-2Dcontamination_&d=DwIFAg&c=ilBQI1lupc9Y65XwNblLtw&r=lTRDjB8ojaf7ZaJ9DHeDAm7e-HFP9fxIkv6fRnV49HE&m=LT539hVXxb8UbjwuyFEu8LY-HOgcCuY1mHRf-oEupas&s=5fdp5U2RTC30FFOaVbbqWZDpiZMSj5qNAVGceighIoE&e= > > - Anderson Materials Evaluation : > https://urldefense.proofpoint.com/v2/url?u=http-3A__www.andersonmaterials.com_test-5Fmethods_testing-2Dfacilities-2Dfor-2Dsilicone-2Dcontamination.html-23&d=DwIFAg&c=ilBQI1lupc9Y65XwNblLtw&r=lTRDjB8ojaf7ZaJ9DHeDAm7e-HFP9fxIkv6fRnV49HE&m=LT539hVXxb8UbjwuyFEu8LY-HOgcCuY1mHRf-oEupas&s=aDv6YBSYLTGmS-4KWx9Y26g6kUQScuxq2R0YHpqyAZU&e= > < > https://urldefense.proofpoint.com/v2/url?u=http-3A__www.andersonmaterials.com_test-5Fmethods_testing-2Dfacilities-2Dfor-2Dsilicone-2Dcontamination.html&d=DwIFAg&c=ilBQI1lupc9Y65XwNblLtw&r=lTRDjB8ojaf7ZaJ9DHeDAm7e-HFP9fxIkv6fRnV49HE&m=LT539hVXxb8UbjwuyFEu8LY-HOgcCuY1mHRf-oEupas&s=BKiIfXNlDvrdfne6ssEqiBepsND0VL-kh0S5rIR2GwQ&e= > > > > Any practice of such test kits and return of experience to share? > > Thanks in advance for your feedbacks. > > Best regards, > > Arnaud Grivon >
