[QuadList] Plasticizer--Photos?

Thu Mar 18 09:01:34 CDT 2010

The white powder referred to is the lubricant drying out.  The lubricant
was a fatty acid called Palmetic acid and the source for some
manufacturers was whale oil.  It gave it that characteristic "new tape"
smell.  Memorex was the worst for 2".

Although I have seen it a few times in 1" it is much less than in quad
and seems to mostly happen with stock manufactured in Japan rather than
in Alabama.  Of course the whale oil is more available in Japan and I
never did find out what the others used here, but I'll bet someone on
this list knows!

Bill Spencer

RF Engineering Supervisor

NorthStar Studios, Inc.

3201 Dickerson Pike

Nashville, TN 37207

Phone 615.650.6000 ext. 6610

Cell 615.445.5616

Fax 615.650.6027

email bill.spencer at northstarstudios.tv

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From: quadlist-bounces at quadvideotapegroup.com
[mailto:quadlist-bounces at quadvideotapegroup.com] On Behalf Of John Walko
Sent: Thursday, March 18, 2010 8:53 AM
To: 'Quad List'; videovault at sky.com
Subject: Re: [QuadList] Plasticizer--Photos?

We've seen this before on 1" videotapes.  I do not know the brand.  I
didn't think to look at what brand/type of 1" tape it was...I just
assumed it was a problem with all 1" tapes of a certain age.

What we noticed was a white power when cleaning the tapes.  This white
dust would get all over the cleaner and on the Plexiglas door that
covers the cleaning tissue and burnishing guides.  We originally thought
it was mold, but upon checking we found out that mold would not come off
the tape as a dust.  In fact, mold would smear on the tape.

I don't think it is a plasticizer...what I've been told is that it is
the lubricants in the tape that are solidifying and coming to the
surface of the tape.  If you clean the tapes, you can get a good play,
but if you allow them to sit for a couple of weeks after cleaning, the
white dust will be back.  If you clean the white material off with
alcohol, it turns the cleaning cloth yellow...which will eventually fade
over time.  I used to have one of the cleaning cloths that I used for
demo purposes...but it has since faded back to white (not as effective a
demonstration any more).

John Walko

Scene Savers

800-978-3445

859-291-5100 (extension 1110)

From: quadlist-bounces at quadvideotapegroup.com
[mailto:quadlist-bounces at quadvideotapegroup.com] On Behalf Of Ted
Langdell
Sent: Wednesday, March 17, 2010 11:48 AM
To: videovault at sky.com; Quad List
Subject: Re: [QuadList] Plasticizer--Photos?

If I'm correctly interpreting what Walter's describing here... 

When dealing with film, it appears as a dandruff-like stuff.  

We see a lot of that on telecine's Particle Transfer Rollers when
transferring older material.

Walter: is this what you're referring to?

If you take a digital picture or several photos, please post to the list
as attachments.  

Keep the entire message size under 1MB and it will go directly to the
list. Otherwise it gets held up for list-parent review.

Ted

On Mar 17, 2010, at 10:24 AM, Trevor Brown wrote:

Never heard it called that before

What brand are the tapes in particular the 2"   ie Memorex Chroma 90 ?

Trevor

UK Member

From: quadlist-bounces at quadvideotapegroup.com
[mailto:quadlist-bounces at quadvideotapegroup.com] On Behalf OfWalter
Forsberg
Sent: 17 March 2010 15:15
To: quadlist at quadvideotapegroup.com
Subject: [QuadList] Plasticizer

Hello Quad Groupers-

I'm looking for info / documentation / personal experiences any of you
may have had with white plasticizer, offering itself up from the
winds/packs of 2" and 1" videotape.

Specifically, are there any trends or commonly believed reasons for this
stuff appearing? (Eg. specific stocks, a particular environmental
storage condition, or manufacturer's container / reel materials.)

I'd also be happy to receive a quoted forward of past discussions on
this topic, as I'm a relative newbie to the list.

Happiest shamrocks & thanks in advance,

Walter Forsberg

NYU-MIAP

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Ted Langdell

Secretary

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