Same thing here, Jeff. I've got a storage-case which has the black foam where I've had some DIP chips for probably 20 years, no residue so far. There must be different brands/types.
On Mon, Oct 30, 2023 at 4:53 PM <bir...@soigeneris.com> wrote: > I have chips that have been stuck in the black anti-static foam for years > and the legs are still nice and shiny. (Just checked). Perhaps it is a > particular brand of foam? > > > > Jeff Birt > > > > > > *From:* M100 <m100-boun...@lists.bitchin100.com> *On Behalf Of *Peter > Noeth > *Sent:* Monday, October 30, 2023 6:16 PM > *To:* Model 100 Discussion <m100@lists.bitchin100.com> > *Subject:* Re: [M100] Anti-static foam types > > > > I would NOT recommend the black carbonized foam for storage. We used to > use that type where I worked as a Component Level computer tech for our > "Component Inventory" many decades ago. It will turn the legs of I.C.s and > transistors black after a few months if you stick them into the foam, > requiring cleaning with a mild abrasive before soldering (risking static > damage). It may be a solution for shipment only. > > > > The other foam looks like High Density Styrofoam, as used in the building > trades for wall insulation. I have seen it both light blue and pink, used > for the purposes you mention, and have never trusted it as styrofoam is > inherently very staticy, even with anti-static additives. I have seen some > people wrap that foam in aluminum foil first before poking any leaded > components into it. This may be a shipment only solution. > > > > I have always used the plastic anti static tubes (rails) that the > manufacturers sell their components in, or the anti-static poly and > mylar bags that DigiKey and other distributors use. With "through hole" > components not being as popular as they once were, and "surface mount" > components now the "norm", your best solution would be the anti-static poly > and mylar bags easily found with an Internet search. > > > > Regards, > > > > PeterN > > > > On Mon, Oct 30, 2023 at 2:42 PM <m100-requ...@lists.bitchin100.com> wrote: > > > Message: 1 > Date: Mon, 30 Oct 2023 14:25:24 -0700 > From: Gary Weber <g...@web8201.com> > To: M100 <m100@lists.bitchin100.com> > Subject: [M100] Anti-static foam types > Message-ID: > < > caajazkoqdyapx1godpsvutedor+x1npum1isuhrv+udoman...@mail.gmail.com> > Content-Type: text/plain; charset="utf-8" > > Question for anyone out there familiar -- > > There's a few kinds of antistatic foams out there that I've come across > which have had DIP chips stuck into them for storage, and the ones I > currently have on hand is the black stuff which is very porous, and this > other very stiff stuff that almost has the feeling of styrofoam. (Not > bendable.) > > Here's the two I have on hand: > [image: image.png] > > Is anyone else familiar with the light colored antistatic "hard" foam > that's in the right of this photo? What's it called and where would you > obtain more of it? It seems to protect a DIP chip's pins much better for > long term storage or shipping and I'd like to have some on hand. > > Thanks, > > -- > Gary Weber > g...@web8201.com > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: < > http://lists.bitchin100.com/private.cgi/m100-bitchin100.com/attachments/20231030/b21a215a/attachment.htm > > > -------------- next part -------------- > A non-text attachment was scrubbed... > Name: image.png > Type: image/png > Size: 557591 bytes > Desc: not available > URL: < > http://lists.bitchin100.com/private.cgi/m100-bitchin100.com/attachments/20231030/b21a215a/attachment.png > > > >
