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Re: [OM] Sticky rubber knobs, chest harness recommendation?

Subject: Re: [OM] Sticky rubber knobs, chest harness recommendation?
From: Dub Snapper <lensmanten@xxxxxxxxx>
Date: Wed, 20 Mar 2024 21:18:13 +0000
Cc: 'Peter Klein' <boulanger.croissant@xxxxxxxxx>
I got a Lowe pro padded harness many yrs ago, very adjustable with clips & 
straps for pouches, you could slide gear around from front to side, 

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On 20 Mar 2024, 15:17, at 15:17, Piers Hemy <piers@xxxxxxxx> wrote:
>It is many years, even a few decades, since I was employed in the
>industrial plastics industry, but I recognise the symptoms of leaching
>plasticizers, Peter. 
>Assuming that the plastics in question to be PVC, my guess is that the
>stickiness is one of several possible phthalate plasticizers - di-allyl
>phthalate, di-iso-octyl phthalate, di-octyl phthalate are some of the
>names I recall, they were interchangeable chemically. They are not
>chemically bonded to the resin, and can thus be "coaxed" out by
>application of an organic solvent, or simply by handling, which last
>probably applies in your case. Phthalate solubility in water varies, so
>rubbing alcohol might not be the best to try, but if you are determined
>to clean up, maybe acetone would be a good one to try .... but it won't
>solve the underlying problem, which will be back.
>I would go for the replacement options which others have suggested.
>-----Original Message-----
>From: LUG <lug-bounces+piers.hemy=gmail.com@xxxxxxxxxxxxxxx> On Behalf
>Of Peter Klein via LUG
>Sent: Wednesday, March 20, 2024 3:08 AM
>To: lug <lug@xxxxxxxxxxxxxxx>; olympus@xxxxxxxxxxxxxxxxx;
>Cc: Peter Klein <boulanger.croissant@xxxxxxxxx>
>Subject: [Leica] Sticky rubber knobs, chest harness recommendation?
>Two questions for our collective expert mind.
>1. My tripod ball head's adjustment knobs have developed "sticky rubber
>syndrome." So has the focusing ring on one of my lenses.  The ball head
>is particularly nasty. It leaves a sticky/oily residue on my fingers, 
>which can then get on other things. Does anyone know a remedy for this?
>2. Can anyone recommend a chest harness or other type of camera strap 
>that spares my neck muscles when I'm out and about using a heavier 
>lens?  I've read so many ads and reviews that I'm cross-eyed, but 
>haven't yet seen "the one." Looking for the minimum amount of hardware 
>to do the job comfortably.
>Details re. the tripod:
>I tried a cloth dampened with rubbing alcohol (70% isopropanol). This 
>appears to partially work, but only after several applications and 
>considerable rubbing. Internet articles are contradictory regarding 
>alcohol, Windex with ammonia, grease-cutting dish detergent, or a 
>"Formula 409-type general purpose cleaner--some say use this or that, 
>some say don't.
>The tripod is a Dolica Proline GX 650B204. I got it using brownie
>my former employer gave me for exemplary tech support. Those points
>only redeemable at some general consumer Web site that sold off last 
>year's goods. So the tripod was probably cheap and cheerful, but it's 
>worked well for 12-odd years. The manufacturer's Web site now looks
>that of a "company" that is selling off everything. I sent them a 
>message, who knows if there will be a useful response. The tripod's
>head is "sold out."
>if all else fails, I suppose I could just wrap the knobs with gaffer 
>tape, or something similar but more permanent.
>Thanks in advance!
>Leica Users Group.
>See http://leica-users.org/mailman/listinfo/lug for more information
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