[QuadList] Edivue--Sprague Magnetics--"Sprague Mag" Magnetic Developer

[Ted Langdell]

Let us know how it works for them.

Have to ask... are they editing/repairing Quad tapes with it?

Ted

On Sep 8, 2011, at 7:01 PM, lee williams wrote:

> Great,
> Thanks Ted.
> That will help them out.
> Lee
>
> --- On Thu, 9/8/11, Ted Langdell <ted at quadvideotapegroup.com> wrote:
>
> From: Ted Langdell <ted at quadvideotapegroup.com>
> Subject: Re: [QuadList] Edivue--Sprague Magnetics--"Sprague Mag"  
> Magnetic Developer
> To: "Quad List" <quadlist at quadvideotapegroup.com>
> Date: Thursday, September 8, 2011, 5:59 PM
>
> On Sep 8, 2011, at 5:29 PM, lee williams wrote:
>
>
>> Does anybody know of anyone still making Edivue?
>> Have a client who is almost out and looking to get a can or two.
>> Thanks
>> Lee
>
> "Edivue" isn't on the market.
>
> However, Sprague Magnetics has a product—Sprague-Mag—that may do the  
> needed job:
>
> http://www.sprague-magnetics.com/faq-7.htm
>
> Technical details and how to use it is described here:
> http://www.sprague-magnetics.com/library/sprgmag.pdf
>
> And partly presented here for educational purposes:
>
> As with many virtually indispensable tools, the concept of the  
> developer is simplicity itself. There are iron particles suspended  
> in a fluid with a high, rapid evaporation rate. Thus, the developer  
> is placed onto the magnetic surface, the liquid evaporates, and the  
> magnetic particles orient themselves in accordance with the magnetic  
> pattern on the surface of the material until the magnetic pattern is  
> fully delineated. The regular particle size ranges from 1 to 3  
> microns.
>
> Environmentally safe. There used to be a number of products  
> available similar to Sprague-Mag, but all of them used ozone  
> depleting CFCs to insure quick liquid evaporation. With the new  
> federal regulations restricting the use of such chemicals, these  
> other magnetic developers have disappeared from the marketplace.  
> Sprague-Mag does not use CFCs, rather it uses an environmentally  
> friendly and acceptable (under current regulations) Methyl  
> Nonafluoroisbutyl Ether/Methyl Nonafluorobutyl Ether as the  
> evaporative liquid that the iron particles are suspended in, and for  
> an aerosol propellant in the spray version, Sprague-Mag uses carbon  
> dioxide.
>
> NOTE: SDF-130A has no effect on magnetic cards, but is an active  
> solvent for some materials such as those used in cassette bodies.  
> Effect on tape and tape coating is minimal. Screen/test the material  
> prior to use.
>
> Directions for use: Shake first to insure proper and even suspension  
> of the magnetic particles. Apply to an inclined surface with a  
> cellulosic paper or tissue as backing to absorb excess Sprague-Mag.  
> This immediate removal of excess material yields a distinct and  
> clean visual trace. When done, remove the Sprague-Mag trace with a  
> cleaning cloth or Scotch removable tape #811, or “Post It” adhesive  
> backing (3M or equivalent).
> 12806
>
>
> Hope this helps.
>
> Ted
>
> Ted Langdell
> Secretary
>
>
> -----Inline Attachment Follows-----
>
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Ted Langdell
Secretary

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